Mathematics, 12.12.2020 17:10 pr47723
An urn contains 4 black and 5 white balls. A ball is drawn at random and then replaced, and then a second ball is drawn. Find the probability that the first is black and the second iswhite.
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i.e. 5 + 4
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An urn contains 4 black and 5 white balls. A ball is drawn at random and then replaced, and then a s...
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