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# a 400ml solution is 20% alcohol by volume. if 100ml of water is added,

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Intern
Joined: 26 Apr 2017
Posts: 3
a 400ml solution is 20% alcohol by volume. if 100ml of water is added,  [#permalink]

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22 Nov 2017, 07:14
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A 400ml solution is 20% alcohol by volume. if 100ml of water is added, what is the new concentration of alcohol, as a percent of volume?
a. 5%
b. 10%
c. 12%
d. 12.5%
e. 16%

How to answer this using alligation?

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Math Expert
Joined: 02 Sep 2009
Posts: 50041
Re: a 400ml solution is 20% alcohol by volume. if 100ml of water is added,  [#permalink]

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22 Nov 2017, 08:59
giangalang wrote:
A 400ml solution is 20% alcohol by volume. if 100ml of water is added, what is the new concentration of alcohol, as a percent of volume?
a. 5%
b. 10%
c. 12%
d. 12.5%
e. 16%

How to answer this using alligation?

--== 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: a 400ml solution is 20% alcohol by volume. if 100ml of water is added, &nbs [#permalink] 22 Nov 2017, 08:59
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