If 2 balls are drawn one after another from a bag containing 3 red and 5 black balls, what is the probability that the : first ball is red and second ball is black.
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red. balls =3
black balls=5
total balls =8
P(RB)=3/8×5/7=15/56
black balls=5
total balls =8
P(RB)=3/8×5/7=15/56
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