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In a college chemistry class, fourteen students are from California. T

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In a college chemistry class, fourteen students are from California. T  [#permalink]

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New post 21 Feb 2019, 21:33
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A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

76% (02:07) correct 24% (01:50) wrong based on 25 sessions

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In a college chemistry class, fourteen students are from California. Two fifths of the students in the course are from Nevada. The remaining quarter of the class is from Washington. How many students are from Nevada?

A) 4

B) 8

C) 16

D) 24

E) 40

SOURCE: PlatinumGMAT

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Re: In a college chemistry class, fourteen students are from California. T  [#permalink]

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New post 21 Feb 2019, 22:23
California - 14
Nevada - \(\frac{2}{5}\)*X
Washington - \(\frac{1}{4}\)*X

\(\frac{3}{4}\)*X = 14+\(\frac{2}{5}\)*X
X = 40
Nevada = \(\frac{2}{5}\)*40 = 16

C is the answer.
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In a college chemistry class, fourteen students are from California. T  [#permalink]

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New post 21 Feb 2019, 23:48
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UB001 wrote:
In a college chemistry class, fourteen students are from California. Two fifths of the students in the course are from Nevada. The remaining quarter of the class is from Washington. How many students are from Nevada?

A) 4

B) 8

C) 16

D) 24

E) 40

SOURCE: PlatinumGMAT


For a class of students in a chemistry class, if two fifths(40%) of the students are
from Nevada and a quarter(25%) of the class is from Washington, the remaining
14(which is 100-25-40 = 35%) of the class is from California, the total number of
students is \(\frac{14}{0.35} = 40\)

Therefore, the total number of students from Nevada is 40% of 40 which is 16(Option C)

PS Some of the common fraction - percentage conversion you need to know: Link
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In a college chemistry class, fourteen students are from California. T   [#permalink] 21 Feb 2019, 23:48
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