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prep question

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jamesk486 Master | Next Rank: 500 Posts Default Avatar
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prep question

Post Mon Apr 23, 2007 12:49 am
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    Among a bunch of sweaters, 3/5 are pullovers and 1/4 are white. What portion of all the sweaters is not white pullovers?

    (1) There are 60 sweaters in total
    (2) 1/3 of the pullovers is white

    Just by eyeballing I know its D, but just wondering how to solve it..

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    Prasanna Master | Next Rank: 500 Posts
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    Post Mon Apr 23, 2007 4:47 am
    Is the answer D? I am getting is as B.

    (2) tells us that 1/3 of the pullovers are white. Since 3/5 of the total are pullovers we can find the fraction of white pullovers and hence the non-white pullovers.

    (1) tells us that there 36 pullovers and 15 whites. This does not help us calculate any additional detail.

    Am I missing anything here?

    gabriel Legendary Member
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    Post Mon Apr 23, 2007 5:06 am
    jamesk486 wrote:
    Among a bunch of sweaters, 3/5 are pullovers and 1/4 are white. What portion of all the sweaters is not white pullovers?

    (1) There are 60 sweaters in total
    (2) 1/3 of the pullovers is white

    Just by eyeballing I know its D, but just wondering how to solve it..
    hmm ... i agree with prassana .. the answer is B and not D ... just a word of caution "eyeballing" culd prove fatal in DS ... there needs to be a concrete strategy to solve DS ...

    jamesk486 Master | Next Rank: 500 Posts Default Avatar
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    Post Mon Apr 23, 2007 10:49 pm
    oh oops sorry..the answer is B Smile

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