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# If 1 cup of water is added to a 5-cup mixture that is 2/3 salt

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Senior Manager
Joined: 27 Feb 2014
Posts: 277
Location: India
GMAT 1: 570 Q49 V20
GPA: 3.97
WE: Engineering (Education)
If 1 cup of water is added to a 5-cup mixture that is 2/3 salt  [#permalink]

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18 Feb 2020, 03:49
4
00:00

Difficulty:

45% (medium)

Question Stats:

64% (01:48) correct 36% (02:28) wrong based on 50 sessions

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If 1 cup of water is added to a 5-cup mixture that is $$\frac{2}{3}$$ salt and $$\frac{1}{3}$$ water, what percent of the 6-cup mixture is salt?​

a. 20%​

b. 25%​

c. 33.33%​

d. 55.56%​

e. 66.67%​

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Manager
Joined: 22 Sep 2014
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Location: United States (CA)
Re: If 1 cup of water is added to a 5-cup mixture that is 2/3 salt  [#permalink]

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18 Feb 2020, 14:08
(2/3) * 5 / 6 = 5/9=0.55555555

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Joined: 24 Sep 2019
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Re: If 1 cup of water is added to a 5-cup mixture that is 2/3 salt  [#permalink]

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18 Feb 2020, 14:15
The chemistry principle of C*V initial = C*V Final can be applied to this problem:
($$\frac{2}{3}$$)*(5) = C Final *6
$$\frac{10}{3}$$* $$\frac{1}{6}$$ = C Final
$$\frac{10}{18}$$ = 0.555555 = 55.5555% = C Final
Ans= D
Re: If 1 cup of water is added to a 5-cup mixture that is 2/3 salt   [#permalink] 18 Feb 2020, 14:15