Wednesday, June 10, 2009

Problem 36 - GMAT Probability




3 comments:

  1. Which is same as picking 1 from 4 people = 1/4 (C)

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  2. Hmm, I made a mistake.

    Split the group into 2 subgroups: the tallest 2; the remaining 4.

    Selecting 3 in such a way that the tallest two are included = 2C2*4C1 = 4

    Selecting 3 out of 6 = 6C3 = 6.5.4/(3.2) = 20

    Ans = 4/20 = 1/5


    Answer is D

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  3. I agree : (2C2 X 4C1)/ 6C3 = 1/5

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