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标题: GWD6-3 [打印本页]

作者: huahua115 时间: 2005-8-18 06:58 标题: GWD6-3

Q3:

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

怎么也算不出是80

作者: efficiency 时间: 2005-8-18 12:58

C（3，10）-C（1，5）C（1，8）=120-40=80

作者: braveMBA 时间: 2005-8-19 13:38

ding !!!

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