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29 Sep 2011, 02:44
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
87% (00:54) correct
13%
(01:06)
wrong
based on 1292
sessions
History
Date
Time
Result
Not Attempted Yet
A certain 4-liter solution of vinegar and water consists of x liters of vinegar and y liters of water. How many liters of vinegar does the solution contain?
(1) x/4 = 3/8
(2) y/4 = 5/8
(1) x/4 = 3/8
(2) y/4 = 5/8
Show SpoilerMy concern
Can someone help to solve this using allegations and mixtures?
NOTE: I know this can be solved using finding values of x and y too... but i am looking for allegations method out of curiosity..
NOTE: I know this can be solved using finding values of x and y too... but i am looking for allegations method out of curiosity..
GMATmission
Joined: 16 Aug 2011
Last visit: 13 Jan 2012
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Location: Singapore
Concentration: Finance, General Management
Schools: INSEAD Jan '13 Said LBS '14
GMAT 1: 680 Q46 V37
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WE:Other (Other)
29 Sep 2011, 03:47
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siddhans
This is not an allegations question. allegations would be used in something like this:
you have a solution which is 10% vinegar and 90% water. The new solution needs to be 85% water. How much vinegar should be added. (not a very good question but something like this).
Let me give you a real question which you may want to solve using allegation:
A certain quantity of 40% solution is replaced with 25% solution such that the new concentration is 35%. What is the fraction of the solution that was replaced?
(A) 1/4
(B) 1/3
(C) 1/2
(D) 2/3
(E) ¾
01 Oct 2011, 02:11
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siddhans
We don't need allegation for solve this question
Given: x + y = 4
(1) x = 1.5
Sufficient.
(2) y = 2.5
hence x = 4 - 2.5 =1.5
Sufficient
Hence D
