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A tank contains

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Senior Manager
Senior Manager
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Joined: 10 Nov 2010
Posts: 268
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 [?]: 57 [0], given: 22

A tank contains [#permalink] New post 13 Feb 2011, 02:03
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A
B
C
D
E

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(N/A)

Question Stats:

67% (01:11) correct 33% (00:00) wrong based on 3 sessions
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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Status: final shaping :]
Joined: 06 Jan 2011
Posts: 47
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Kudos [?]: 4 [0], given: 6

Re: A tank contains [#permalink] New post 13 Feb 2011, 04:21
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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Manager
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Re: A tank contains [#permalink] New post 03 Nov 2011, 10:33
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 %
answer : D
Manager
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Joined: 29 Oct 2011
Posts: 188
Concentration: General Management, Technology
Schools: Sloan '16 (D)
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Re: A tank contains [#permalink] New post 03 Nov 2011, 10:41
Correct, 50/750 is the answer.
Re: A tank contains   [#permalink] 03 Nov 2011, 10:41
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