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# Gmat prep Ratio question

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Manager
Joined: 01 Dec 2007
Posts: 52
Gmat prep Ratio question [#permalink]

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09 Sep 2008, 09:13
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

answer is 25 . how come?
Current Student
Joined: 11 May 2008
Posts: 552
Re: Gmat prep Ratio question [#permalink]

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09 Sep 2008, 09:50
let concentrate be c and water be W
given C/W =1/3.

total reqd juice = 6*200 ounce = 1200ounce ( 200 6 ounce is just a red herring )
out of this we know that there will be both water and concentrate.
how much??
of course 1/4 concentrate and 3/4 water [1:3 given]
so in the end, we have 1/4*1200=300 ounce of concentrate
now we know that 1 can has 12 ounce.
so no. of cans = 300/12=25 nos of 12ounce cans
SVP
Joined: 17 Jun 2008
Posts: 1507
Re: Gmat prep Ratio question [#permalink]

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09 Sep 2008, 10:22
blover,

the catch here is that 200 servings are of 6 ounce each. For calculation purpose, I can convert it into 100 servings of 12 ounce each. This will require 1/4th of concentrate. Hence, 25 cans of concentrate.
Manager
Joined: 03 Jun 2008
Posts: 131
Schools: ISB, Tuck, Michigan (Ross), Darden, MBS
Re: Gmat prep Ratio question [#permalink]

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09 Sep 2008, 11:54
arjtryarjtry wrote:
let concentrate be c and water be W
given C/W =1/3.

total reqd juice = 6*200 ounce = 1200ounce ( 200 6 ounce is just a red herring )
out of this we know that there will be both water and concentrate.
how much??
of course 1/4 concentrate and 3/4 water [1:3 given]
so in the end, we have 1/4*1200=300 ounce of concentrate
now we know that 1 can has 12 ounce.
so no. of cans = 300/12=25 nos of 12ounce cans

explained quite well.
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Manager
Joined: 28 Aug 2008
Posts: 98
Re: Gmat prep Ratio question [#permalink]

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09 Sep 2008, 12:10
c= concentrate
w= water
J= Juice

1c+3w= 1J

12oz+26oz= 48oz ---> 48oz = 8 6oz servings

200/8 = 25 6oz servings
Re: Gmat prep Ratio question   [#permalink] 09 Sep 2008, 12:10
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# Gmat prep Ratio question

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