问个数学题。。。请大家帮忙

leonQ · 发表于 2010-12-28 22:36:54

Is the number of members of Club X greater than the number of members of Club Y ?
(1)    Of the members of Club X, 20 percent are also members of Club Y.
(2)    Of the members of Club Y, 30 percent are also members of Club X.

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.

做到过两次，一会C，一会E。。我觉得是E啊。。求大大指点。。。

逍遥游天下 · 发表于 2010-12-28 22:44:48

是OG DS的89题，去书后面看看解释就知道了。是一道比较阴险的好题，选D。

逍遥游天下 · 发表于 2010-12-28 22:45:12

sorry，不是D，是C

louie10 · 发表于 2010-12-28 22:49:29

C吧。
有一拨人是in both x and y的，这拨人在x里头算20%，在y里头算30%，hence比出人数多少。

问个数学题。。。请大家帮忙

所属分类: GMAT考试

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