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In a certain school, there are 160 boys and 240 girls. If 15 percent

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Joined: 02 Sep 2009
Posts: 53066
In a certain school, there are 160 boys and 240 girls. If 15 percent  [#permalink]

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18 Oct 2018, 01:22
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Difficulty:

15% (low)

Question Stats:

94% (01:18) correct 6% (02:37) wrong based on 42 sessions

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In a certain school, there are 160 boys and 240 girls. If 15 percent of the boys are left-handed and 25 percent of the girls are left-handed, what percent of the school`s entire student population is left-handed?

A. 18
B. 20
C. 21
D. 23
E. 24

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Joined: 26 Feb 2017
Posts: 89
Location: India
GPA: 3.99
Re: In a certain school, there are 160 boys and 240 girls. If 15 percent  [#permalink]

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18 Oct 2018, 01:28
15% of the boys are left handed = .15* 160 = 24
25% of girls are left handed = .25 * 240 = 60
=(24+60/400) * 100
= 21 %

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Re: In a certain school, there are 160 boys and 240 girls. If 15 percent   [#permalink] 18 Oct 2018, 01:28
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