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

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CEO
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What is the algebraic solution? A 500 ml solution is 20% [#permalink] New post 21 Oct 2007, 14:07
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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
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 [#permalink] New post 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
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 [#permalink] New post 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
VP
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Joined: 09 Jul 2007
Posts: 1105
Location: London
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Kudos [?]: 78 [0], given: 0

 [#permalink] New post 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
  [#permalink] 21 Oct 2007, 14:37
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What is the algebraic solution? A 500 ml solution is 20%

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