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Can someone explain this one for me... the answer it gives is 14/15 but that seems way to high of a possibility for an answer. 52. A bag of 10 marbles contains 3 red marbles and 7 blue marbles. If two marbles are selected at random, what is the probability that at least one marble is blue? A. 21/50 ...

by tbasebal24

Tue Oct 16, 2012 10:59 am
Forum: GMAT Math
Topic: Probability and Combination Problems
Replies: 16
Views: 47993