Question 256850
A jar contains 5 red marbles and 3 black marbles. 2 marbles are drawn with replacement. what is the probability that one is black and one is red?
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P(2 black) = 3C2/8C2 = 3/28
P(2 red) = 5C2/8C2 = 10/28
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P(one black and one red) = 1-[3/28+10/28) = 15/28
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Cheers,
Stan H.