GMAT Percents
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Source: Beat The GMAT — Data Sufficiency |
Not an expert but let me give a try.
we need to fond % female......
A
P 40% female
no info for others so insuff
B
F+I 80%male
so 20% female
no info for p
insuff
A+B
we have %info females with PFI but we do not know much much each group contributes to.
Remember: We CANNOT directly add percentages.
it may be possible that 40% female turn out to be 10000
and 20% turn out to be 2
or vice versa
hence E is the answer
Has we known about no of ppl with each grade [or may be no of ppl are equal] thn ans would have been C
we need to fond % female......
A
P 40% female
no info for others so insuff
B
F+I 80%male
so 20% female
no info for p
insuff
A+B
we have %info females with PFI but we do not know much much each group contributes to.
Remember: We CANNOT directly add percentages.
it may be possible that 40% female turn out to be 10000
and 20% turn out to be 2
or vice versa
hence E is the answer
Has we known about no of ppl with each grade [or may be no of ppl are equal] thn ans would have been C
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logitech
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Great point stop@800,stop@800 wrote:Not an expert but let me give a try.
we need to fond % female......
A
P 40% female
no info for others so insuff
B
F+I 80%male
so 20% female
no info for p
insuff
A+B
we have %info females with PFI but we do not know much much each group contributes to.
Remember: We CANNOT directly add percentages.
it may be possible that 40% female turn out to be 10000
and 20% turn out to be 2
or vice versa
hence E is the answer
Has we known about no of ppl with each grade [or may be no of ppl are equal] thn ans would have been C
One take away from this question is that you can use the same logic in Critical Reasoning questions that involve %'s.
LGTCH
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