Thursday, June 11, 2009

Problem 41 - GMAT Overlapping Sets

If 20 percent of the students at a certain school went to a camping trip and took more than $100, and 75 percent of the students who went to the camping trip did not take more than $100, what percentage of the students at the school went to the camping trip?

(A) 95
(B) 90
(C) 85
(D) 80
(E) 75
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5 comments:

  1. Bhushan S.October 5, 2009 at 2:50 AM

    95% OA A

    ReplyDelete
  2. Vaishali BansalOctober 21, 2009 at 10:14 AM

    I think it is D... 80%

    let total students be = t
    let the students going on trip = s

    20% of t = 25 % of s (as, 75% didn't take more than $100)

    simple calculation gives us,

    s/t = 80%

    ReplyDelete
  3. AnonymousNovember 9, 2009 at 4:41 PM

    Excellent problem. completely bowled me out. Answer is 80%

    ReplyDelete
  4. RommelNovember 13, 2009 at 1:12 AM

    Stud Attend camping SANot Camp

    > 100 20

    < 100 .75 X

    Total X 100-x 100

    20 +0.75 X = X

    X = 80

    Ans D ...easy

    ReplyDelete
  5. Vikram SikandMarch 12, 2010 at 4:02 AM

    total # students=t
    trip =e
    .25e=.2t
    e/t *100 = 80

    ReplyDelete

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