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题库 / Prep2007E1-PS-43
A committee of threepeople is to be chosen from four married couples. What is the number of different committeesthat can be chosen if two people who are married to each other cannot bothserve on the committee?
16
24
26
30
32
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先选三对夫妻C43
然后再从每对夫妻里任意地挑一个人组成三组人C21*C21*C21
所以可能性为：C43*C21*C21*C21=4*2*2*2=32
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