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标题: gwd2 gmat-12 [打印本页]

作者: taiwan008 时间: 2005-8-9 06:38 标题: gwd2 gmat-12

There are 11 w. and 9 m. To select a committee of 2 w. and 2 m, how many different such committees are possible?

120/720/1060/1520/1980

答案为E?

作者: recently 时间: 2005-8-9 12:49

C11,2*C9,2=(11*10/2)*(9*8/2)=55*36=1980

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