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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!
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