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# This one is from the OG - I read thru the explanation, but

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Manager
Joined: 14 Sep 2006
Posts: 197

Kudos [?]: 58 [0], given: 0

Schools: Olin Business School - Washington University
This one is from the OG - I read thru the explanation, but [#permalink]

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14 Sep 2006, 20:45
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This one is from the OG - I read thru the explanation, but still cant seem to figure out why the OA is correct...can someone explain?

The ratio, by volume, of soap to alcohol to water in certain solution is 2:50:100. The solution will be altered so that the ratio of soap to alchol is doubled while the ratio of soap to water is halved. If the altered solution will contain 100 cubic centimeters of alcohol, how many cubic centimeters of water will it contain?

A 50
B 200
C 400
D 625
E 800

Kudos [?]: 58 [0], given: 0

Director
Joined: 23 Jun 2005
Posts: 840

Kudos [?]: 86 [0], given: 1

GMAT 1: 740 Q48 V42

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14 Sep 2006, 20:52
Ans E
2:50:100::S:A:W
S:A = doubled, so 2:25
S:W = halved, so 2: 200
S:A:W::2: 25: 200
Given A = 100.
So, W = 800

Kudos [?]: 86 [0], given: 1

14 Sep 2006, 20:52
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# This one is from the OG - I read thru the explanation, but

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