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# y grams of water were added to the 90 grams of a strong

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Manager
Joined: 09 Oct 2008
Posts: 93
y grams of water were added to the 90 grams of a strong [#permalink]

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10 Oct 2008, 20:03
y grams of water were added to the 90 grams of a strong solution of acid. As a result, the concentration of acid in the solution became 1/3 times of the intial concentration. What was the concentration of acid in the original solution?

Doesn't it means that its 100% acid?
Thamks

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Manager
Joined: 14 Oct 2008
Posts: 158

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14 Oct 2008, 07:51
what are the answer choices ?
Moreover, how can the concentration become 100 % acid ? Its written that y gms of WATER is mixed .... not another solution with acid .
Intern
Joined: 12 Sep 2008
Posts: 23

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14 Oct 2008, 08:14
To be exact, "the strong solution of acid" in the question doesn't give you any numbers to work with. We don't know how strong it is. We just know it is strong. This doesn't cut it! We can't solve the problem unless the we can find out what the initial concentration of acid is.

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Re: what is strong?   [#permalink] 14 Oct 2008, 08:14
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# y grams of water were added to the 90 grams of a strong

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