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# X grams of water were added to the 80 grams of a strong

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Joined: 04 Jun 2008
Posts: 126
X grams of water were added to the 80 grams of a strong  [#permalink]

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30 Aug 2008, 05:27
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$$X$$ grams of water were added to the 80 grams of a strong solution of acid. As a result, the concentration of acid in the solution dropped by $$Y$$ percent. What was the concentration of acid in the original solution?

1. $$X = 80$$
2. $$Y = 50$$

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30 Aug 2008, 06:14
chan4312 wrote:
$$X$$ grams of water were added to the 80 grams of a strong solution of acid. As a result, the concentration of acid in the solution dropped by $$Y$$ percent. What was the concentration of acid in the original solution?

1. $$X = 80$$
2. $$Y = 50$$

1 and 2 itself not suffcient

when you combine..

orignal concentrations c1
concentration after adding water = c2=c1/2

c1=A1/80 c2= A1/80+80 =1/2 c1

No way we can find A1..

Will go for E.

What is OA
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Re: X grams of water were added to the 80 grams of a strong  [#permalink]

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02 Aug 2017, 17:09
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--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. 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.

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Re: X grams of water were added to the 80 grams of a strong   [#permalink] 02 Aug 2017, 17:09
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