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In a corporation, 50 percent of the male employees and 40

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Joined: 17 Oct 2008
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In a corporation, 50 percent of the male employees and 40 [#permalink]  17 Oct 2008, 10:22
In a corporation, 50 percent of the male employees and 40 percent of the female employees are at least 35 years old. If 42 percent of all the employees are at least 35 years old, what fraction of the employees in the corporation are females?

A. 3/5
B. 2/3
C. 3/4
D. 4/5
E. 5/6
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Joined: 17 Jun 2008
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Re: male & female [#permalink]  17 Oct 2008, 11:08
0.5m + 0.4f = 0,42(m+f)
or 4m = f.

Hence, f/(f+m) = 4/5.

Hence, D.
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Re: male & female [#permalink]  17 Oct 2008, 11:13
mikegao wrote:
In a corporation, 50 percent of the male employees and 40 percent of the female employees are at least 35 years old. If 42 percent of all the employees are at least 35 years old, what fraction of the employees in the corporation are females?

A. 3/5
B. 2/3
C. 3/4
D. 4/5
E. 5/6

0.5m + 0.f = 0.42 (m+f)
4m = f
so, f/(m+f) = 4/5
_________________
Re: male & female   [#permalink] 17 Oct 2008, 11:13
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