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# A tank contains

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Senior Manager
Joined: 10 Nov 2010
Posts: 263
Location: India
Concentration: Strategy, Operations
GMAT 1: 520 Q42 V19
GMAT 2: 540 Q44 V21
WE: Information Technology (Computer Software)
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Kudos [?]: 336 [0], given: 22

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13 Feb 2011, 03:03
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67% (01:11) correct 33% (00:00) wrong based on 3 sessions

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156) A tank contains 10,000 gallons of solution that is 5% sodium chloride by volume.if 2,500 gallons of water evaporate from the tank, the remaining solution will be approximately what percent of sodium chloride.

a) 1.25
b) 3.75
c) 6.25
d) 6.67
e) 11.7
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Joined: 06 Jan 2011
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Kudos [?]: 4 [0], given: 6

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13 Feb 2011, 05:21
10.000 -> 5% = 500 gallons

10.000 - 2.500 -> 7.500 gallons

500 gallons / 7500 gallons = 1/15 = 0,0667 = 6,67%
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03 Nov 2011, 11:33
Sodium chloride before evaporation: 0.05 * 10,000 = 500

After evaporation volume = 10000 - 2500 = 7500

Percent of sodium chloride after evaporation = 500 * 100/7500 = 20/3 = 6.666 %
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03 Nov 2011, 11:41
Re: A tank contains   [#permalink] 03 Nov 2011, 11:41
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