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QUESTION OF ALLIGATION ..

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QUESTION OF ALLIGATION .. [#permalink] New post 24 Sep 2011, 12:43
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?
Joined: 31 Dec 1969
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Re: QUESTION OF ALLIGATION .. [#permalink] New post 24 Sep 2011, 13:03
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, 13:03
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