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标题: GWD 数学题请教 [打印本页]

作者: xp635 时间: 2008-10-18 15:59 标题: GWD 数学题请教

如题，谢谢

A certain club has 20 members. What is the ratio of the member of 5-member committees that can be formed from the members of the club to the number of 4-member committees that can be formed from the members of the club?

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A. 16 to 1

B. 15 to 1

C. 16 to 5

D. 15 to 6

E. 5 to 4

作者: karen_gao 时间: 2008-10-20 14:05

C 吧,  就是20个人中取5的组合数除以20个人中取4的组合数

作者: xp635 时间: 2008-10-29 16:44

thx

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