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    本题由lindy提供
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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?


    (A)1/2  

    (B)1/3  

    (C)1/4  

    (D)1/5  

    (E)1/6  


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答案:
D
Alice去年的
入每月一样,她每月都会存下同样多的钱 年末,她存下的钱,是她每月收入中没存的钱的三倍 她去年省下的所有钱都是来自她的收入,她每月省下了收入的分数? 设月薪y,所求为 X,12*y*X=3*(y—y*X),X=1/5

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