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A certain jar contains only b black marbles, w white [#permalink]
24 Jul 2009, 13:23
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A certain jar contains only b black marbles, w white marbles, and r red marbles. If one marble is to be chosen at random from the jar, is the probability that the marble chosen will be red grater than the probability that the marble chosen will be white?
1) r/(b+w) > w/(b+r) 2) b - w > r
Thanks a lot. I saw this on a GMATPrep sample exam.