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# PS - ratios and algebra

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Intern
Joined: 19 Jan 2009
Posts: 22

Kudos [?]: 5 [0], given: 0

PS - ratios and algebra [#permalink]

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05 Feb 2009, 06:11
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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

Kudos [?]: 5 [0], given: 0

VP
Joined: 18 May 2008
Posts: 1259

Kudos [?]: 526 [0], given: 0

Re: PS - ratios and algebra [#permalink]

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05 Feb 2009, 07:24
Let monthly saving be S
Let fraction of money saved every month=x
Thus money saved every month=S/x
Money not saved every month=S-S/x
Then total money saved in a year=12S/x
Acc to statement,
12S/x=3(S-S/x)
solving x=5
Hence D i.e 1/5

Kudos [?]: 526 [0], given: 0

Director
Joined: 25 Oct 2008
Posts: 593

Kudos [?]: 1132 [0], given: 100

Location: Kolkata,India
Re: PS - ratios and algebra [#permalink]

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17 Jul 2009, 19:59
Did'nt get this sum.Too many variables!!Does anybody have a plug in approach?
_________________

http://gmatclub.com/forum/countdown-beginshas-ended-85483-40.html#p649902

Kudos [?]: 1132 [0], given: 100

Re: PS - ratios and algebra   [#permalink] 17 Jul 2009, 19:59
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