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Of all sophomore students attending a certain college, 20%

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Senior Manager
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Of all sophomore students attending a certain college, 20% [#permalink] New post 15 Dec 2003, 11:55
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Of all sophomore students attending a certain college, 20% are enrolled in an English course while 10% are enrolled in a psychology course. How many sophomore students attend the college?
(1) 5% of the sophomore students at the college are enrolled in both an English course and a psychology course.
(2) A total of 210 sophomore students at the college are enrolled in neither an English course nor a psychology course.
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shubhangi

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 [#permalink] New post 15 Dec 2003, 11:58
C.

(1) We know percentage that's enrolled in both... just 3rd of four unknown parts.
(2) We get number that is not enrolled in either. Just 3rd of four unknowns (not considering information in Stmnt1)
(combined) We know all four parts. English, Psych, Both, Neither. So we can find total.
Senior Manager
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Joined: 30 Aug 2003
Posts: 325
Location: dallas , tx
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 [#permalink] New post 15 Dec 2003, 12:01
Yup!! no need to workout..
Thanks
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shubhangi

  [#permalink] 15 Dec 2003, 12:01
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Of all sophomore students attending a certain college, 20%

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