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GMAT Prep DS3

by ri2007 » Sun Nov 11, 2007 3:40 pm
At least 100 students at a certain high school study Japanese. If 4% of the students at the school whi study french also study japanese. Do more students study french than Japanese?

1) 16 students at the school study both French & Japanese
2) 10% of the students at the school who study Japanese also study French

OA B

Would appreciate if you could give your explaination

thanks
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Source: — Data Sufficiency |
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Re: GMAT Prep DS3

by jayhawk2001 » Sun Nov 11, 2007 10:04 pm
ri2007 wrote:At least 100 students at a certain high school study Japanese. If 4% of the students at the school whi study french also study japanese. Do more students study french than Japanese?

1) 16 students at the school study both French & Japanese
2) 10% of the students at the school who study Japanese also study French

thanks
1 - insufficient.
4/100 * F = 16, so F = 400. We only know that "atleast 100" students
study Japanese. No specific number. So insuf.

2 - sufficient.
10/100*J = 4/100*F
10J = 4F
J = .4F. So, suff

Hence B
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