At a certain company, the average number of years of : DS Archive
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# At a certain company, the average number of years of

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At a certain company, the average number of years of [#permalink]

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12 May 2007, 14:54
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At a certain company, the average number of years of experience is 9.8 years for the male employees and 9.1 years for the female employees. What is the ratio of the number of the company's male employees to the number of the company's female employees?

(1) There are 52 male employees at the company
(2) The average number of years of experience for the company's male and female employees combined is 9.3 years

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12 May 2007, 17:32
kookoo4tofu wrote:
At a certain company, the average number of years of experience is 9.8 years for the male employees and 9.1 years for the female employees. What is the ratio of the number of the company's male employees to the number of the company's female employees?

(1) There are 52 male employees at the company
(2) The average number of years of experience for the company's male and female employees combined is 9.3 years

the question is ratio of male/female = ?

# of Male / Total = p

average of all emplyoees = P(m) + (1-P) (f)
9.3 = p (9.8) + (1-p) (9.1)
p = 2/7
1-p = 5/7
so male/female = 2/5
Re: GMATPrep: DS, ratio   [#permalink] 12 May 2007, 17:32
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