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# What is the algebraic solution? A 500 ml solution is 20%

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CEO
Joined: 21 Jan 2007
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What is the algebraic solution? A 500 ml solution is 20% [#permalink]

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21 Oct 2007, 14:07
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

What is the algebraic solution?

A 500 ml solution is 20% alcohol by volume. If 100 ml of water is added, what is the new concentration of alcohol?
VP
Joined: 09 Jul 2007
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21 Oct 2007, 14:15
Do you have 16.6 or 17 % among answer choices

new solution 500+100=600

600x=500*1/5
x=1/6=~17%
CEO
Joined: 21 Jan 2007
Posts: 2756
Location: New York City
Followers: 11

Kudos [?]: 861 [0], given: 4

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21 Oct 2007, 14:33
Ravshonbek wrote:
Do you have 16.6 or 17 % among answer choices

new solution 500+100=600

600x=500*1/5
x=1/6=~17%

thanks. i think i am getting dumber as i study.
VP
Joined: 09 Jul 2007
Posts: 1104
Location: London
Followers: 6

Kudos [?]: 103 [0], given: 0

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21 Oct 2007, 14:37
bmwhype2 wrote:
Ravshonbek wrote:
Do you have 16.6 or 17 % among answer choices

new solution 500+100=600

600x=500*1/5
x=1/6=~17%

thanks. i think i am getting dumber as i study.

http://www.purplemath.com
and mgmat 7 series have nice explanations
21 Oct 2007, 14:37
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# What is the algebraic solution? A 500 ml solution is 20%

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