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4 March, 07:50

A bag has 5 red marbles, 6 black marbles and 4 blue marbles. what is the probability of picking a redmarble, replacing it, and then picking a blue marble?

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  1. 4 March, 07:55
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    A = picking a red marble

    B = picking a blue marble

    P (A * B) = (5/15) (4/15)

    P (A * B) = 20/225 or 4/45
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