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two boxes are selected randomly.the first box contains 2 white balls and 3 black balls.the second ball contains 3 white balls and 4 black balls.what is the probability of drawing a white ball?

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    Assuming that the pick is either one box or the other "ball," either-or probabilities are found by adding the individual probabilities.

    2/5 + 3/7 = ?

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    posted by PsyDAG

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