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Alice's take-home pay last year was the same each month and

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Joined: 23 Oct 2008
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Alice's take-home pay last year was the same each month and [#permalink] New post 14 Dec 2008, 19:23
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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 monthy 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


I don't understand the question. could anyone please explain?
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Re: V. Difficult Problem Solving from GMATPrep [#permalink] New post 14 Dec 2008, 20:00
yhc25 wrote:
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 monthy 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\
I don't understand the question. could anyone please explain?


lets say take home pay=P and saves X

P-x=spends..

12X=3*spends

12X=3(P-x)
12X=3P-3x
15X=3P

X=1/5 P

D it is
Re: V. Difficult Problem Solving from GMATPrep   [#permalink] 14 Dec 2008, 20:00
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Alice's take-home pay last year was the same each month and

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