求一道GWD31套的数学题详解

高正太爱吃肉 · 发表于 2011-11-5 18:41:56

A certain club has 20 members.What is the ratio of the number 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?（答案：16 to 5)

高正太爱吃肉 · 发表于 2011-11-5 19:51:38

为啥没人回复饿

心有林夕一点通 · 发表于 2011-11-5 20:07:43

C5 20除以C4 20。排列。

高正太爱吃肉 · 发表于 2011-11-5 20:28:54

谢了...我理解错题意了。。。。

求一道GWD31套的数学题详解

所属分类: GMAT考试

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