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If 12 ounces of strong solution of vinegar is mixed with 50

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Manager
Joined: 11 Jan 2008
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If 12 ounces of strong solution of vinegar is mixed with 50 [#permalink]  19 Nov 2008, 21:01
If 12 ounces of strong solution of vinegar is mixed with 50 ounces of water to form three percent vinegar, what was the original strength of the vinegar solution?
19.3
17
16.67
15.5
12.5
Manager
Joined: 09 Jul 2008
Posts: 111
Location: Dallas, TX
Schools: McCombs 2011
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Re: m07#8 [#permalink]  19 Nov 2008, 21:30
jackychamp wrote:
If 12 ounces of strong solution of vinegar is mixed with 50 ounces of water to form three percent vinegar, what was the original strength of the vinegar solution?
19.3
17
16.67
15.5
12.5

Total volume = 62 oz

3% makes $$\frac{3}{100} * 62 = \frac {93}{50}$$

% of vinegar in original =

$$\frac {93*100}{50*12}$$= 15.5

D
Re: m07#8   [#permalink] 19 Nov 2008, 21:30
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