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M21-18

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Math Expert
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Joined: 02 Sep 2009
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M21-18  [#permalink]

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New post 16 Sep 2014, 01:11
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A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

75% (01:02) correct 25% (01:01) wrong based on 132 sessions

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Math Expert
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Joined: 02 Sep 2009
Posts: 56272
Re M21-18  [#permalink]

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New post 16 Sep 2014, 01:11
Official Solution:

Among the 150 people attending GMAT preparation course, if 90 attend Verbal classes, 80 attend Quant classes, and 35 are on a special challenging program and do not attend either the Verbal or Quant classes, how many people attend only Quant classes?

A. 25
B. 35
C. 40
D. 45
E. 50


\(\{Total\} = \{Verbal\} + \{Quant\} - \{Both\} + \{Neither\}\);

\(150 = 90 + 80 - \{Both\} + 35\), solving gives \(\{Both\} = 55\).

Therefore, since 80 people attend Quant classes and 55 people attend both classes then \(80-55=25\) people attend ONLY Quant classes.


Answer: A
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Re: M21-18  [#permalink]

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New post 28 Nov 2017, 08:32
Use Venn diagram concept. Option A
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Re: M21-18  [#permalink]

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New post 05 Apr 2018, 17:38
Can we use a table for this problem?
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Re: M21-18   [#permalink] 05 Apr 2018, 17:38
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M21-18

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