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Gmatprep - Probability [#permalink]

12 Mar 2007, 22:10

Not sure how to solve this. Help :idea:

OA: A

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[#permalink]

12 Mar 2007, 23:14

Its clear from the equation 1 that r>w, hence the probability of choosing red ball is greater than white ball so 1) is sufficient.

from equation ii) b-w>r, its not clear that whether r is greater than w, so eq ii) is insuff

regards,

Amardeep

[#permalink] 12 Mar 2007, 23:14

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