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GMAT Prep Q: Percents

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GMAT Prep Q: Percents

by krnverma » Mon Aug 08, 2011 4:01 am
Q: Each of the students is a certain class received a single grade of P, F, or I. What percent of the students in the class were females?

(1) Of those who received a P, 40 percent were females.
(2) of those who received either an F or I, 80 percent were males.

OA: E

Please can some one explain?
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by Anurag@Gurome » Mon Aug 08, 2011 5:22 am
krnverma wrote:Q: Each of the students is a certain class received a single grade of P, F, or I. What percent of the students in the class were females?

(1) Of those who received a P, 40 percent were females.
(2) of those who received either an F or I, 80 percent were males.

OA: E

Please can some one explain?
(1) only gives us the info about the people with grade P but not about F or I; NOT sufficient.

(2) does not give any info on people with grade P; NOT sufficient.

Combining (1) and (2), we still don't know the ratio of students who got grade P to the students who got grade F or I; NOT sufficient.

The correct answer is E.
Anurag Mairal, Ph.D., MBA
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