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标题: Prep-132 [打印本页]

作者: shefff 时间: 2010-5-26 19:51 标题: Prep-132

132.14175-!-item-!-187;#058&010326
If the drama club and music club are combined, what percent of the combined membership will be male?

(1)Of the 16 members of the drama club, 15 are male.
(2)Of the 20 members of the music club, 10 are male.

答案E，让我怀疑我的智商，为什么不是(15+10)/(16+20)？

作者: 赢智 时间: 2010-5-26 19:58

(1) 只给了drama club 里其中的会员有 16人,而者16人里有 15人是male, 推得 1位是女的,但是没给drama club 总共会员人数, insufficient
(2)也是同样的道理, insufficient
(1)+ (2)仍然无法知道总共会员人数,无法知道percent of the combined membership will be male, insufficient

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