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Of the 720 students at a certain university, 25 percent are
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Updated on: 21 Jul 2013, 01:48
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Of the 720 students at a certain university, 25 percent are seniors. If x seniors were to graduate early and leave the university and no additional students entered or left the university, what value of x would reduce the number of seniors at the university to 20 percent? (A) 30 (B) 36 (C) 42 (D) 45 (E) 48
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Originally posted by jobeto12 on 20 Jul 2013, 19:35.
Last edited by Bunuel on 21 Jul 2013, 01:48, edited 1 time in total.
Edited the question.



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Re: Of the 720 students at a certain university, 25 percent are
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20 Jul 2013, 23:05
jobeto12 wrote: Of the 720 students at a certain university, 25 percent are seniors. If x seniors were to graduate early and leave the university and no additional students entered or left the university, what value of x would reduce the number of seniors at the university to 20 percent?
A) 30 (B) 36 (C) 42 (D) 45 (E) 48 No of seniors = \(720*\frac{1}{4}\) = 180. Given that \(\frac{180x}{720x} = \frac{1}{5}\) Thus, \(9005x = 720 x \to 180 = 4x \to x = 45\). D.
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23 Sep 2014, 12:41
jobeto12 wrote: Of the 720 students at a certain university, 25 percent are seniors. If x seniors were to graduate early and leave the university and no additional students entered or left the university, what value of x would reduce the number of seniors at the university to 20 percent?
(A) 30 (B) 36 (C) 42 (D) 45 (E) 48 Sol: 180x= 20% of (720x) 4x=180 x=45



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Re: Of the 720 students at a certain university, 25 percent are
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01 Dec 2016, 19:47
(180x)/(720x) = 1/5 5(180x) = (720x) 9005x = 720x 180 = 4x x = 45
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Of the 720 students at a certain university, 25 percent are
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02 Dec 2016, 14:29
Hi Bunuel,
Question says "what value of x would reduce the number of seniors at the university to 20 percent?"
I could not understand why everyone is considering 20% of the total student if the question says that x would reduce the number of seniors to 20%, Probably I misinterpret the question and that's why got answer 36. Please help !
If the question would be what value of x would reduce the number of seniors at the university by 20 percent? Will this make any difference in the solution?



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Re: Of the 720 students at a certain university, 25 percent are
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24 Dec 2018, 22:29
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Re: Of the 720 students at a certain university, 25 percent are
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