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A container holds 4 quarts of alcohol and 4 quarts of water. How many

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Veritas Prep GMAT Instructor
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Re: A container holds 4 quarts of alcohol and 4 quarts of water. How many [#permalink]

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New post 05 Oct 2017, 01:10
sameerkamath21 wrote:
VeritasPrepKarishma

Thank you so much Karishma. Just one doubt. The A2 and A1 that you used in your blog post about the same topic keep changing as per the question right? And what will w1/w2 be in this case?As in acc to this question?



I am not sure I understand what your question is. Do you mean to ask how we decide on how to allocate subscripts?

This post shows one way: https://gmatclub.com/forum/a-container- ... l#p1935591

Alternatively, pure water can be A1, w1 and the 50-50 mix can be A2, w2. The answer obtained will be the same.

Again, you worked with concentration of water here. You could work with the concentration of alcohol too (pure water having 0 alcohol).
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Re: A container holds 4 quarts of alcohol and 4 quarts of water. How many [#permalink]

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New post 06 Oct 2017, 09:56
shrive555 wrote:
A container holds 4 quarts of alcohol and 4 quarts of water. How many quarts of water must be added to the container to create a mixture that is 3 parts alcohol to 5 parts water by volume?

A. 4/3
B. 5/3
C. 7/3
D. 8/3
E. 10/3


We can create the following equation in which n = the added water:

4/(4 + n) = 3/5

20 = 12 + 3n

8 = 3n

8/3 = n

Answer: D
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Re: A container holds 4 quarts of alcohol and 4 quarts of water. How many   [#permalink] 06 Oct 2017, 09:56

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A container holds 4 quarts of alcohol and 4 quarts of water. How many

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