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In a group of 9 children, there are twice as many girls as boys, and t
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02 Jan 2022, 07:19
02 Jan 2022, 07:19
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In a group of 9 children, there are twice as many girls as boys, and twice as many right-handed people as there are left-handed people. If a third of the boys are left-handed, how many girls are right-handed?
A. 1
B. 3
C. 4
D. 5
E. 6
A. 1
B. 3
C. 4
D. 5
E. 6
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Re: In a group of 9 children, there are twice as many girls as boys, and t
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02 Jan 2022, 07:25
02 Jan 2022, 07:25
Carcass wrote:
In a group of 9 children, there are twice as many girls as boys, and twice as many right-handed people as there are left-handed people. If a third of the boys are left-handed, how many girls are right-handed?
A. 1
B. 3
C. 4
D. 5
E. 6
A. 1
B. 3
C. 4
D. 5
E. 6
In a group of 9 children, there are twice as many girls as boys
Let x = the number of boys
So, 2x = the number of girls
We can write: x + 2x = 9
Solve to get x = 3, which means there are 3 boys and 6 girls
In a group of 9 children, there are twice as many right-handed people as there are left-handed people.
Using the same approach we can see that there are 3 left-handed people, and 6 right-handed people.
If a third of the boys are left-handed, how many girls are right-handed?
There are 3 boys.
1/3 of 3 = 1.
So there 1 left-handed boy, which means the other 2 boys are right-handed
There are 6 right-handed people all together.
If 2 of them are boys, then the other 4 must be girls
Answer: C
gmatclubot
Re: In a group of 9 children, there are twice as many girls as boys, and t [#permalink]
02 Jan 2022, 07:25
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