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At Tyler High School, there are twice as many girls than boy

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At Tyler High School, there are twice as many girls than boy [#permalink] New post 22 May 2017, 01:11
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At Tyler High School, there are twice as many girls than boys on the yearbook staff. At one staff meeting, the percentage of girls attending was twice the percentage of boys. What percent of those attending were boys?

A) 20

B) 25

C) 30

D) 33

E) 50
[Reveal] Spoiler: OA

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Re: At Tyler High School, there are twice as many girls than boy [#permalink] New post 27 Sep 2017, 08:56
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Let's assume that the number of boys is X, then the number of girls is 2X.

At the meeting, let the number of boys be b and girls be g. Then, (g/2X)*100= 2*(b/X)*100, for which g=4b

Then, the total number of students at the meeting is g+b = 4b+b = 5b

Thus, as number of boys is b, %of boys is (b/5b)*100 = 20

Hence, Answer A!
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Re: At Tyler High School, there are twice as many girls than boy [#permalink] New post 28 May 2018, 18:23
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Carcass wrote:



At Tyler High School, there are twice as many girls than boys on the yearbook staff. At one staff meeting, the percentage of girls attending was twice the percentage of boys. What percent of those attending were boys?

A) 20

B) 25

C) 30

D) 33

E) 50


We can let the number of girls = 20 and the number of boys = 10. We can let the percentage of girls attending = 100 and the percentage of boys = 50.

Thus, there were 20 girls and 5 boys, so the percentage of boys was 5/25 = 1/5 = 20%.

Answer: A
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Re: At Tyler High School, there are twice as many girls than boy   [#permalink] 28 May 2018, 18:23
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At Tyler High School, there are twice as many girls than boy

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