请教Combintronics问题

bb88 · 发表于 2012-2-2 17:51:35

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 committee are possible?

我认为有10个人，所以应该是10（第一轮）*8（第二轮）*6（第三轮）=480

答案为80，请大大指教。

carolyntse · 发表于 2012-2-2 17:57:55

C35X2X2X2=80
从5couple中选3个，每个couple有2种可能

bb88 · 发表于 2012-2-2 18:03:05

谢谢

请教Combintronics问题

所属分类: GMAT考试

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