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sửa đổi
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tổ hợp 11 (8)
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tổ hợp 11 (8) Bài style="mso-bidi-font-weight:
normal"> 11: Người style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.85pt;mso-no-proof:yes"> ta viết style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
mso-font-width:160%;mso-no-proof:yes"> các style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.25pt;
mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;mso-font-width:159%;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
mso-font-width:159%;mso-no-proof:yes"> 6 style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.3pt;
mso-no-proof:yes"> chữ style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:1.25pt;mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
mso-font-width:159%;mso-no-proof:yes"> bằng style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.3pt;
mso-no-proof:yes"> các style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.25pt;mso-no-proof:yes"> chữ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.25pt;mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
mso-font-width:159%;mso-no-proof:yes"> 1, style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.4pt;
mso-no-proof:yes"> 2, style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:1.15pt;mso-no-proof:yes"> 3, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.4pt;mso-no-proof:yes"> 4, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.4pt;mso-no-proof:yes"> 5 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.3pt;mso-no-proof:yes"> như style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.25pt;mso-no-proof:yes"> sau: style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.3pt;
mso-no-proof:yes"> Trong style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;mso-font-width:159%;mso-no-proof:yes"> mỗi style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.85pt;mso-no-proof:yes"> số
được style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:1.25pt;mso-no-proof:yes"> viết style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.3pt;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.3pt;mso-no-proof:yes"> một style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.3pt;mso-no-proof:yes"> chữ style="font-size:
12.0pt;mso-bidi-font-size:11.0pt;font-family:"Times New Roman","serif";
color:black;letter-spacing:-.05pt;mso-no-proof:yes">số style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.3pt;mso-no-proof:yes"> xuất style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.3pt;mso-no-proof:yes"> hiện style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.3pt;mso-no-proof:yes"> hai lần style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> còn style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:1.05pt;mso-no-proof:yes"> các style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.0pt;
mso-no-proof:yes"> chữ style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.05pt;
mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:1.3pt;mso-no-proof:yes"> còn style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.05pt;
mso-no-proof:yes"> lại style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:1.1pt;mso-no-proof:yes"> xuất style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.3pt;mso-no-proof:yes"> hiện style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.05pt;mso-no-proof:yes"> một style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
mso-font-width:160%;mso-no-proof:yes"> lần style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;font-family:"Times New Roman","serif";color:black;
letter-spacing:-.15pt;mso-no-proof:yes">n. Hỏi style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.6pt;mso-no-proof:yes"> có bao nhiêu style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> như style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> vậy?
tổ hợp 11 (8) Bài 11: Người ta viết các số có 6 chữ số bằng các chữ số 1, 2, 3, 4, 5 như sau: Trong mỗi sốđược viết có một chữ số xuất hiện hai lần còn các chữ số còn lại xuất hiện một lần. Hỏi có bao nhiêu số như vậy?
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sửa đổi
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tổ hợp 11 (9)
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tổ hợp 11 (9) Bài style="mso-bidi-font-weight:
normal"> 12: Từ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.25pt;mso-no-proof:yes"> một style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.3pt;mso-no-proof:yes"> tập style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.05pt;mso-no-proof:yes"> thể style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.25pt;mso-no-proof:yes"> 14 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.3pt;mso-no-proof:yes"> người style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.85pt;mso-no-proof:yes"> gồm style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.85pt;mso-no-proof:yes"> 6 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.3pt;mso-no-proof:yes"> năm style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.1pt;mso-no-proof:yes"> và style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.25pt;mso-no-proof:yes"> 8 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
mso-font-width:159%;mso-no-proof:yes"> nữ style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.25pt;
mso-no-proof:yes"> trong đó style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
mso-font-width:159%;mso-no-proof:yes"> có style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.3pt;
mso-no-proof:yes"> An style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:1.3pt;mso-no-proof:yes"> và style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.25pt;mso-no-proof:yes"> Bình, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.4pt;mso-no-proof:yes"> người style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.1pt;mso-no-proof:yes"> ta muốn
chọn style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.35pt;mso-no-proof:yes"> một style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> tổ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> công style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.1pt;mso-no-proof:yes"> tác style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.3pt;mso-no-proof:yes"> gồm style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:-.05pt;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> 6 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.1pt;mso-no-proof:yes"> người. Tìm style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.1pt;mso-no-proof:yes"> số style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> cách style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.35pt;mso-no-proof:yes"> chọn style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.1pt;mso-no-proof:yes"> trong mỗi style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:-.05pt;mso-no-proof:yes"> trường style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> hợp style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> sau:
a) style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.4pt;mso-no-proof:yes"> Trong style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.1pt;mso-no-proof:yes"> tổ style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-no-proof:yes"> phải style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:-.05pt;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> cả style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.3pt;mso-no-proof:yes"> nam lẫn style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.35pt;mso-no-proof:yes"> nữ?
b) style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.4pt;mso-no-proof:yes"> Trong style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> tổ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> 1 tổ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> trưởng, style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.45pt;
mso-no-proof:yes"> 5 tổ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> viên style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.1pt;mso-no-proof:yes"> hơn style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.1pt;
mso-no-proof:yes"> nữa style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.5pt;mso-no-proof:yes"> Ann style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> và style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.3pt;mso-no-proof:yes"> Bình style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.1pt;
mso-no-proof:yes"> không style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.35pt;mso-no-proof:yes"> đồng style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> thời style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:-.05pt;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> mặt style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-no-proof:yes"> trong tổ? (chủ yếu)
tổ hợp 11 (9) Bài 12: Từ một tập thể 14 người gồm 6 năm và 8 nữ trong đó có An và Bình, người ta muốnchọn một tổ công tác gồm có 6 người. Tìm số cách chọn trong mỗi trường hợp sau:a) Trong tổ phải có cả nam lẫn nữ?b) Trong tổ có 1 tổ trưởng, 5 tổ viên hơn nữa An và Bình không đồng thời có mặt trong tổ? (chủ yếu)
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sửa đổi
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tổ hợp 11 (10)
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tổ hợp 11 (10) Bài style="mso-bidi-font-weight:
normal"> 13: style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;mso-font-width:182%;mso-no-proof:yes"> Một style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
mso-font-width:160%;mso-no-proof:yes"> đồn style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;font-family:"Times New Roman","serif";color:black;
letter-spacing:-.05pt;mso-no-proof:yes">n tàu style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.3pt;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
mso-font-width:159%;mso-no-proof:yes"> 3 style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.05pt;
mso-no-proof:yes"> toa chở style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.2pt;mso-no-proof:yes"> khác. style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.4pt;mso-no-proof:yes"> Toa style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.25pt;mso-no-proof:yes"> I, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.4pt;mso-no-proof:yes"> II, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.15pt;mso-no-proof:yes"> III. style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.15pt;
mso-no-proof:yes"> Trên style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:1.05pt;mso-no-proof:yes"> sân style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.05pt;
mso-no-proof:yes"> an style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;font-family:"Times New Roman","serif";color:black;letter-spacing:-.05pt;
mso-no-proof:yes">ga có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
mso-font-width:159%;mso-no-proof:yes"> 4 style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:1.3pt;
mso-no-proof:yes"> khách style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:1.05pt;mso-no-proof:yes"> chuẩn style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.3pt;mso-no-proof:yes"> bị style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.1pt;mso-no-proof:yes"> đi style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:1.1pt;mso-no-proof:yes"> tàu.
Biết style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.85pt;
mso-no-proof:yes"> mỗi style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:-.05pt;mso-no-proof:yes"> toa có style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.35pt;mso-no-proof:yes"> ít style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.6pt;mso-no-proof:yes"> nhất style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.6pt;
mso-no-proof:yes"> 4 style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.35pt;mso-no-proof:yes"> chỗ style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.1pt;mso-no-proof:yes"> trống. style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.45pt;
mso-no-proof:yes"> Hỏi:a) style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.4pt;mso-no-proof:yes"> Có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> bao nhiêu style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> cách style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.1pt;
mso-no-proof:yes"> sắp style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.55pt;mso-no-proof:yes"> xếp style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> cho 4 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> vị style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:-.05pt;mso-no-proof:yes"> khách style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-no-proof:yes"> lên style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.1pt;mso-no-proof:yes"> 3 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> toa.
b) style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;line-height:115%;font-family:"Calibri","sans-serif";mso-fareast-font-family:
SimSun;mso-fareast-theme-font:minor-fareast;mso-bidi-font-family:Calibri;
color:black;letter-spacing:.4pt;mso-ansi-language:EN-US;mso-fareast-language:
ZH-CN;mso-bidi-language:AR-SA;mso-no-proof:yes"> Có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:
"Calibri","sans-serif";mso-fareast-font-family:SimSun;mso-fareast-theme-font:
minor-fareast;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA;
mso-no-proof:yes"> bao nhiêu style="font-size:12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:
"Calibri","sans-serif";mso-fareast-font-family:SimSun;mso-fareast-theme-font:
minor-fareast;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA;
mso-no-proof:yes"> cách style="font-size:12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:
"Calibri","sans-serif";mso-fareast-font-family:SimSun;mso-fareast-theme-font:
minor-fareast;mso-bidi-font-family:Calibri;color:black;letter-spacing:.1pt;
mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA;
mso-no-proof:yes"> sắp style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;line-height:115%;font-family:"Calibri","sans-serif";mso-fareast-font-family:
SimSun;mso-fareast-theme-font:minor-fareast;mso-bidi-font-family:Calibri;
color:black;letter-spacing:.35pt;mso-ansi-language:EN-US;mso-fareast-language:
ZH-CN;mso-bidi-language:AR-SA;mso-no-proof:yes"> xếp style="font-size:12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:
"Calibri","sans-serif";mso-fareast-font-family:SimSun;mso-fareast-theme-font:
minor-fareast;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA;
mso-no-proof:yes"> cho 4 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:
"Calibri","sans-serif";mso-fareast-font-family:SimSun;mso-fareast-theme-font:
minor-fareast;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA;
mso-no-proof:yes"> vị style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;line-height:115%;font-family:"Calibri","sans-serif";mso-fareast-font-family:
SimSun;mso-fareast-theme-font:minor-fareast;mso-bidi-font-family:Calibri;
color:black;letter-spacing:-.05pt;mso-ansi-language:EN-US;mso-fareast-language:
ZH-CN;mso-bidi-language:AR-SA;mso-no-proof:yes"> khách style="font-size:
12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:"Calibri","sans-serif";
mso-fareast-font-family:SimSun;mso-fareast-theme-font:minor-fareast;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.35pt;mso-ansi-language:EN-US;mso-fareast-language:
ZH-CN;mso-bidi-language:AR-SA;mso-no-proof:yes"> lên style="font-size:12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:
"Calibri","sans-serif";mso-fareast-font-family:SimSun;mso-fareast-theme-font:
minor-fareast;mso-bidi-font-family:Calibri;color:black;letter-spacing:.1pt;
mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA;
mso-no-proof:yes"> tàu style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;line-height:115%;font-family:"Calibri","sans-serif";mso-fareast-font-family:
SimSun;mso-fareast-theme-font:minor-fareast;mso-bidi-font-family:Calibri;
color:black;letter-spacing:.35pt;mso-ansi-language:EN-US;mso-fareast-language:
ZH-CN;mso-bidi-language:AR-SA;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:
"Calibri","sans-serif";mso-fareast-font-family:SimSun;mso-fareast-theme-font:
minor-fareast;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA;
mso-no-proof:yes"> tyle="font-size:12.0pt;mso-bidi-font-size:
11.0pt;line-height:115%;font-family:"Times New Roman","serif";mso-fareast-font-family:
SimSun;mso-fareast-theme-font:minor-fareast;color:black;letter-spacing:-.05pt;
mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA;
mso-no-proof:yes">1 toa có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:
"Calibri","sans-serif";mso-fareast-font-family:SimSun;mso-fareast-theme-font:
minor-fareast;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA;
mso-no-proof:yes"> 3 style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;line-height:115%;font-family:"Calibri","sans-serif";mso-fareast-font-family:
SimSun;mso-fareast-theme-font:minor-fareast;mso-bidi-font-family:Calibri;
color:black;letter-spacing:-.1pt;mso-ansi-language:EN-US;mso-fareast-language:
ZH-CN;mso-bidi-language:AR-SA;mso-no-proof:yes"> trong 4 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:
"Calibri","sans-serif";mso-fareast-font-family:SimSun;mso-fareast-theme-font:
minor-fareast;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA;
mso-no-proof:yes"> vị style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;line-height:115%;font-family:"Calibri","sans-serif";mso-fareast-font-family:
SimSun;mso-fareast-theme-font:minor-fareast;mso-bidi-font-family:Calibri;
color:black;letter-spacing:-.05pt;mso-ansi-language:EN-US;mso-fareast-language:
ZH-CN;mso-bidi-language:AR-SA;mso-no-proof:yes"> khách style="font-size:
12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:"Calibri","sans-serif";
mso-fareast-font-family:SimSun;mso-fareast-theme-font:minor-fareast;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.1pt;mso-ansi-language:EN-US;mso-fareast-language:
ZH-CN;mso-bidi-language:AR-SA;mso-no-proof:yes"> nói style="font-size:
12.0pt;mso-bidi-font-size:11.0pt;line-height:115%;font-family:"Calibri","sans-serif";
mso-fareast-font-family:SimSun;mso-fareast-theme-font:minor-fareast;mso-bidi-font-family:
Calibri;color:black;letter-spacing:-.05pt;mso-ansi-language:EN-US;mso-fareast-language:
ZH-CN;mso-bidi-language:AR-SA;mso-no-proof:yes"> trên.
tổ hợp 11 (10) Bài 13: Một đồn tàu có 3 toa chở khác. Toa I, II, III. Trên sân ga có 4 khách chuẩn bị đi tàu.Biết mỗi toa có ít nhất 4 chỗ trống. Hỏi:a) Có bao nhiêu cách sắp xếp cho 4 vị khách lên 3 toa.b) Có bao nhiêu cách sắp xếp cho 4 vị khách lên tàu có 1 toa có 3 trong 4 vị khách nói trên.
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sửa đổi
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tổ hợp 11 (11)
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tổ hợp 11 (11) Bài style="mso-bidi-font-weight:
normal"> 14: Trong style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> số style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> 16 style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> học style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.5pt;mso-no-proof:yes"> sinh có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> 3 style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> học style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.55pt;mso-no-proof:yes"> sinh giỏi, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.7pt;mso-no-proof:yes"> 5 style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.55pt;
mso-no-proof:yes"> khá, style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.7pt;mso-no-proof:yes"> 8 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> trung style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.8pt;mso-no-proof:yes"> bình. style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.7pt;
mso-no-proof:yes"> Có style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.8pt;mso-no-proof:yes"> bao nhiêu style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.8pt;
mso-no-proof:yes"> cách style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> style="font-size:
12.0pt;mso-bidi-font-size:11.0pt;font-family:"Times New Roman","serif";
color:black;letter-spacing:-.05pt;mso-no-proof:yes">chia số
học style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.3pt;mso-no-proof:yes"> sinh đó style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.35pt;
mso-no-proof:yes"> thành style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.1pt;mso-no-proof:yes"> hai tổ, style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.2pt;mso-no-proof:yes"> mỗi style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:-.05pt;
mso-no-proof:yes"> tổ style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.35pt;mso-no-proof:yes"> 8 style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> học style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.3pt;mso-no-proof:yes"> <span style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;font-family:"Times New Roman","serif";color:black;
letter-spacing:-.1pt;mso-no-proof:yes">sinh sao cho mỗi style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:-.05pt;
mso-no-proof:yes"> tổ style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.55pt;mso-no-proof:yes"> đều style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.35pt;mso-no-proof:yes"> học style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.3pt;mso-no-proof:yes"> sinh giỏi style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.1pt;mso-no-proof:yes"> và style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.5pt;mso-no-proof:yes"> mỗi style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:-.05pt;
mso-no-proof:yes"> tổ style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.55pt;mso-no-proof:yes"> có style="font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;
mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;color:black;
letter-spacing:.55pt;mso-no-proof:yes"> ít
nhất style="font-size:12.0pt;mso-bidi-font-size:
11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:
Calibri;color:black;letter-spacing:.6pt;mso-no-proof:yes"> hai học style="font-size:12.0pt;
mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:
Calibri;mso-bidi-font-family:Calibri;color:black;letter-spacing:.3pt;
mso-no-proof:yes"> sinh khá.
tổ hợp 11 (11) Bài 14: Trong số 16 học sinh có 3 học sinh giỏi, 5 khá, 8 trung bình. Có bao nhiêu cách chia sốhọc sinh đó thành hai tổ, mỗi tổ 8 học sinh sao cho mỗi tổ đều có học sinh giỏi và mỗi tổ có ítnhất hai học sinh khá.
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được thưởng
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Đăng nhập hàng ngày 04/10/2013
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được thưởng
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Đăng nhập hàng ngày 03/10/2013
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được thưởng
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Đăng nhập hàng ngày 02/10/2013
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được thưởng
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Đăng nhập hàng ngày 01/10/2013
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được thưởng
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Đăng nhập hàng ngày 30/09/2013
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được thưởng
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Đăng nhập hàng ngày 26/09/2013
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được thưởng
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Đăng nhập hàng ngày 06/09/2013
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được thưởng
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Đăng nhập hàng ngày 24/08/2013
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được thưởng
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Đăng nhập hàng ngày 23/08/2013
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được thưởng
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Đăng nhập hàng ngày 22/08/2013
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