GWD 第四套 Q5

tracyforever · 发表于 2010-2-27 17:35:46

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

A) 16 to 1
B) 15 to 1
C) 15 to 5
D) 15 to 6
E) 5 to 4

My answer is 1:5... Haiz... dun know how to tackle this problem!!!

跟秋香打奔儿 · 发表于 2010-2-27 17:46:04

楼主，你的答案有错误吧，应该是16：5
20个里面选5个：20个里面选4个，楼主再想想

tracyforever · 发表于 2010-2-27 17:53:30

A) 16 to 1
B) 15 to 1
C) 16 to 5
D) 15 to 6
E) 5 to 4

对不起对不起，答案是16:5，为什么阿，望指教！

跟秋香打奔儿 · 发表于 2010-2-27 17:55:49

c(5,20):c(4,20)=16:5

tracyforever · 发表于 2010-2-27 18:19:49

我可以问问一个很傻的问题么，c(5,20):c(4,20)。。。这个是什么意思？c(5,20):c(4,20)。。。

GWD 第四套 Q5

所属分类: GMAT考试

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