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标题: 求助两道PREP数学题 [打印本页]

作者: gmat740740 时间: 2011-4-5 09:11 标题: 求助两道PREP数学题

139.

A set of 15 different integers has a median of 25 and a range of 25.What is the greatest possible integer that could be in this set?

(A) 32

(B) 37

(C) 40

(D) 43

(E) 50
答案是D。我觉得50可以的。前8个数包括中数都是25，后面7个数中最大的数是50也符合题中条件。中数前的数不能等于中数吗？

Alice's take-home pay last year was the same each month, and she saved the same fraction of her take-home pay each month.The total amount of money that she had saved at the end of the year was 3 times the amount of that portion of her monthly take-home pay that she did not save.If all the money that she saved last year was from her take-home pay, what fraction of her take-home pay did she save each month?
答案是1/5? 以前做的题，只记了答案，可现在做不出这个答案了。只可能是读题问题了。。。。哪位能否做出的同时将题中的关系句子翻译一下。
十分感谢！

作者: arthurman 时间: 2011-4-5 20:48

第一道人家说的是different integers。。。哎。。。我也经常看不清条件。。。

作者: mudiduanger 时间: 2011-4-7 21:09

第一题每个整数都是不同的

第二题设比例为x
x*12=3*（1-x），x=0.2。

作者: gmat740740 时间: 2011-4-8 06:42

多谢大家！

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