一道OG上的ds题求助。。

灵狩Icy · 发表于 2015-4-25 11:53:44

What percent of the drama club members enrolled at a certain school are female student?
(1) Of the female students enrolled at the school, 40% are members of the drama club.
(2) Of the students enrolled at the school ,25% are members of the drama club.
___________________________
求的是不是Drama 和female 和school 的交集么？
（1）不是已经给出40%了么？

为什么答案是E？

Lan0218 · 发表于 2015-4-25 11:58:39

(1) （members of the drama club）/ female students enrolled at the school
(2) (members of the drama club) / students enrolled at the school

题目要求的是：female student/ drama club members
分母是不同的

ukyo2003 · 发表于 2015-4-25 14:00:06

设女生人数W，男生人数M，(1) drama的女生0.4W; (2)所有drama的男女是0.25(W+M)，1+2得出0.4W/ (0.25W+0.25M)，因为不知道M具体多少，还是没法求结果，E

灵狩Icy · 发表于 2015-4-25 15:29:48

Lan0218 发表于 2015-4-25 11:58
(1) （members of the drama club）/ female students enrolled at the school
(2) (members of the d ...

原来如此！谢谢大神~~

灵狩Icy · 发表于 2015-4-25 15:30:32

ukyo2003 发表于 2015-4-25 14:00
设女生人数W，男生人数M，(1) drama的女生0.4W; (2)所有drama的男女是0.25(W+M)，1+2得出0.4W/ (0.25W+0.25 ...

明白了！谢谢！！

littlesouthsea · 发表于 2015-7-13 19:28:17

楼主打出来的题，如上面同学所讲，解析正确。

但是，楼主题目是打错了吗？第（2）条件里：Of the students，应该是：Of the male students。少打了个male。

OG原题应该是：
What percent of the drama club members enrolled at a certain school are female students?
(1) Of the female students enrolled at the school, 40 percent are members of the drama club.
(2) Of the male students enrolled at the school, 25 percent are members of the drama club.

[考古] 一道OG上的ds题求助。。

所属分类: GMAT考试

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