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# A 5-liter jug contains 4 liters of a saltwater solution that

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Director
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A 5-liter jug contains 4 liters of a saltwater solution that [#permalink]

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26 Apr 2006, 00:09
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A 5-liter jug contains 4 liters of a saltwater solution that is 15 percent salt. If 1.5 liters of the solution spills out of the jug, and the jug is then filled to capacity with water, approximately what percent of the resulting solution in the jug is salt?

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Director
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26 Apr 2006, 00:51
My choice is 7,5%....

Simply did the following...

2.5 liters of which 15% is salt = 0.375 l.

The jug refilled to 5 liters.... so salt remains at 0.375 and total mixture is 5 liters...

so 0.375/5=0.075.... 7.5%

Though believe it is not that simple

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26 Apr 2006, 02:02
We're told 1.5 litres spilt out, so now we're left with 2.5 litres. Of these, 0.375 litres salt, 1.125 water.

So the salt concentration is now 0.375/5 * 100% = 7.5%

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Director
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26 Apr 2006, 02:06
that answer seems right but i dont think its that simple either.

all i know from chemistry is C1V1=C2V2

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26 Apr 2006, 05:11
after removing 1.5 litre........

2.5 litre - 15% salt

double the water -> half the salt percentage

5 litre -> 7.5%

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Director
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26 Apr 2006, 06:55
joemama142000 wrote:
that answer seems right but i dont think its that simple either.

all i know from chemistry is C1V1=C2V2

I think you should treat GMAT questions as simple as possible, unless stated otherwise...

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27 Apr 2006, 11:24
8 4/37%

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27 Apr 2006, 13:06
sanjos wrote:
8 4/37%

You have to calculate the ratio of the salt to the whole 5l,
not of the salt to the water.

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27 Apr 2006, 13:22
ccax wrote:
sanjos wrote:
8 4/37%

You have to calculate the ratio of the salt to the whole 5l,
not of the salt to the water.

Got it! Thanks a lot!

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27 Apr 2006, 19:45
Got 7.5 as well

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28 Apr 2006, 00:57
I got 0.375/4, but looking at the answer saw my mistake. it should be 7.5%

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Re: A 5-liter jug contains 4 liters of a saltwater solution that [#permalink]

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19 Jun 2017, 09:14
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Re: A 5-liter jug contains 4 liters of a saltwater solution that   [#permalink] 19 Jun 2017, 09:14
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# A 5-liter jug contains 4 liters of a saltwater solution that

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