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# Of the students in a certain school, 15 percent are nrolled

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Of the students in a certain school, 15 percent are nrolled [#permalink]  12 Jul 2008, 07:16
Of the students in a certain school, 15 percent are nrolled in an art class and 10 percent are enrolled in a music class. What percent of the students in the school are enrolled in neither an art class nor a music class?
(1) 2/3 of the students who are enrolled in an art class are also enrolled in a music class.
(2) There are more than 100 students in the school.

Please don't forget the detailed explanation. Very very important .
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Re: Sending out another SOS [#permalink]  12 Jul 2008, 08:17
A

I used a venn diagram.

Left circle = Art @ 15%. right circle = Music at 10%

(1) tells us 2/3 of the students who are enrolled in an art class (10% of total Population) are also enrolled in a music class. This means that the all of students enrolled in music are also enrolled in an art class. Sufficient.

(2) Doesn't tell us anything about the relationship between the 2 classes. In sufficient.

TheBigCheese wrote:
Of the students in a certain school, 15 percent are nrolled in an art class and 10 percent are enrolled in a music class. What percent of the students in the school are enrolled in neither an art class nor a music class?
(1) 2/3 of the students who are enrolled in an art class are also enrolled in a music class.
(2) There are more than 100 students in the school.

Please don't forget the detailed explanation. Very very important .

_________________

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J Allen Morris
**I'm pretty sure I'm right, but then again, I'm just a guy with his head up his a.

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Re: Sending out another SOS   [#permalink] 12 Jul 2008, 08:17
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