QUESTION OF ALLIGATION .. : General GMAT Questions and Strategies
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# QUESTION OF ALLIGATION ..

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Joined: 24 Sep 2011
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24 Sep 2011, 11:43
plss help me for question of alligations ??

" WHAT QUANTITY OF A 60% ACID SOLUTION SHOULD BE MIXED WITH 120 OZ. OF 30% ACID SOLUTION TO GET A 50% ACID SOLUTION?
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Re: QUESTION OF ALLIGATION .. [#permalink]

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24 Sep 2011, 12:03
Let x = quantity of acid.

0.6x + 0.3*120 = 0.5*(120+x)
0.6x + 36 = 60 + 0.5x
0.1x = 24
x = 240 oz
Re: QUESTION OF ALLIGATION ..   [#permalink] 24 Sep 2011, 12:03
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# QUESTION OF ALLIGATION ..

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