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At a certain high school, 40% of the students are boys and 60% are gir

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At a certain high school, 40% of the students are boys and 60% are gir  [#permalink]

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New post 06 Apr 2018, 04:46
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A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

89% (01:22) correct 11% (00:53) wrong based on 41 sessions

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At a certain high school, 40% of the students are boys and 60% are girls. Of the girls, 40% take the bus to school and the rest walk. Of the boys, half take the bus to school and half walk. What percent of all students at the high school walk to school?

A. 24%
B. 36%
C. 44%
D. 56%
E. 64%

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Re: At a certain high school, 40% of the students are boys and 60% are gir  [#permalink]

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New post 06 Apr 2018, 04:58
Option D 56%
Making a simple 2X2 Matrix to solve for percentages involved.
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Re: At a certain high school, 40% of the students are boys and 60% are gir  [#permalink]

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New post 07 Apr 2018, 02:42
Bunuel wrote:
At a certain high school, 40% of the students are boys and 60% are girls. Of the girls, 40% take the bus to school and the rest walk. Of the boys, half take the bus to school and half walk. What percent of all students at the high school walk to school?

A. 24%
B. 36%
C. 44%
D. 56%
E. 64%


Walking girls = 0.6 * 0.6 = 0.36

Walking boys = 0.4 * 0.5 =0.2

Total waking students = 0.56 =56%

Answer: D
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Re: At a certain high school, 40% of the students are boys and 60% are gir &nbs [#permalink] 07 Apr 2018, 02:42
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At a certain high school, 40% of the students are boys and 60% are gir

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