[問題]GWD 13-12

網站 · 由 **Flory** » 2005-11-12 10:54

There are 11 women and 9 men in a certain club. If the club is to select a committee of 2 women and 2 men, how many different such committees are possible?

A. 120
B. 720
C. 1060
D. 1520
E. 1980

Ans: E. 1980

Can anyone tell me why?
Thanks!

由 **zazer.lin** » 2005-11-12 15:20

C(11,2) * C(9, 2) = 1980
如果需要解釋上列式子的話...再麻煩你回文吧...

網站 · 由 **Flory** » 2005-11-14 16:59

zazer.lin \$m[1]:C(11,2) * C(9, 2) = 1980
如果需要解釋上列式子的話...再麻煩你回文吧...

yes, would you please kindly explain this formula?
我曾經面臨到許多類似的問題, 也咖啡店內看到解答由於對於此式子不解, 所以還是無法解決問題.

若您可以將上列式子解釋的詳細點, 大大感恩~^^

由 **lunar916** » 2005-11-14 18:31

Search "permutation combination" on google

[問題]GWD 13-12

[問題]GWD 13-12

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