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20% of incoming freshman at a certain university have taken

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20% of incoming freshman at a certain university have taken [#permalink] New post 03 Oct 2011, 17:56
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20% of incoming freshman at a certain university have taken a calculus course. Among the incoming freshman who have not taken a calculus course, 148 have taken a pre-calculus course and 44 havent taken a precalculus couse. how many incoming freshman are there in the university?
Answer: 240
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Status: Bell the GMAT!!!
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Re: 20% of incoming freshman at a certain university have taken [#permalink] New post 06 Oct 2011, 05:49
pm334 wrote:
20% of incoming freshman at a certain university have taken a calculus course. Among the incoming freshman who have not taken a calculus course, 148 have taken a pre-calculus course and 44 havent taken a precalculus couse. how many incoming freshman are there in the university?
Answer: 240


0.8x = 148+44
x = 240
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Senior Manager
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Re: 20% of incoming freshman at a certain university have taken [#permalink] New post 10 Oct 2011, 01:55
X be the total Incoming Freshman.
4/5X= haven't taken calculus course = 148+44=192
X=240
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Re: 20% of incoming freshman at a certain university have taken [#permalink] New post 10 Oct 2011, 09:35
Number of people who didn't take a calculus course = 148+44 =192 that is 80% of total freshman

Number of Freshman joined the university = 192/0.8 = 240
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Re: 20% of incoming freshman at a certain university have taken [#permalink] New post 10 Oct 2011, 17:26
let the total incoming freshman be x.

given 20x/100 have taken calculus 1.

80x/100 have not taken calculus 1.


also given 80x/100 = 148+44

=> x = 240
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Re: 20% of incoming freshman at a certain university have taken [#permalink] New post 10 Oct 2011, 21:42
80% have not taken calculus
.8x=148+44
.8x=192
x=240
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Re: 20% of incoming freshman at a certain university have taken   [#permalink] 10 Oct 2011, 21:42
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