tommyaberman
03.12.2021 •
Mathematics
Urn 1 contains 7 red and 3 white balls. Urn 2 contains 5 red and 4 white balls. A ball is drawn from urn 1 and placed in urn 2. Then a ball is drawn from urn 2. If the ball drawn from urn 2 is red, what is the probability that the ball drawn from urn 1 was red?
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Ответ:
its a
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