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Question from Gmat Prep- Help please! 10

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by bobdylan » Wed Apr 18, 2012 5:50 am
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 take-home pay taht she did NOT save..If all the money that she saved last year was from the take-home pay, what fraction of her take -home pay did she saved each month?
a)1/2
b)1/3
c)1/4
d)1/5
e)1/6
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Source: — Problem Solving |

by Anurag@Gurome » Wed Apr 18, 2012 5:53 am
bobdylan 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 take-home pay taht she did NOT save..If all the money that she saved last year was from the take-home pay, what fraction of her take -home pay did she saved each month?
a)1/2
b)1/3
c)1/4
d)1/5
e)1/6
Let Alice's take home pay = $x and she saved $y each month.
Amount she saved at the end of year = $12y.
Amount not saved every month = $(x - y)
So, 12y = 3(x -y) implies 5y = x or y = x/5

The correct answer is D.
Anurag Mairal, Ph.D., MBA
GMAT Expert, Admissions and Career Guidance
Gurome, Inc.
1-800-566-4043 (USA)

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