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- 精华
- 0
- 积分
- 2760
- 经验
- 2760 点
- 威望
- 275 点
- 金钱
- 275 ￥
- 魅力
- 275
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求解一道数学题
If a committee of 3 people is to be selected from among 5 married couples so that the committee does not include two people who are married to each other, how many such committees are possible?
A.20
B.40
C.50
D.80
E.120
答案是D
而我得出的结果却是10*8*6=480
相差甚远啊，NN们能否一解释疑啊 |
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