4. There are three identical bags. First bag contains 8 red and 2 black balls,
second bag contains 6 red and 4 black balls, and 3rd bag contains 7 red and 3
black balls. A bag is selected at random and the ball is drawn from the
selected bag.
If the drawn ball is black, what is the probability that it has come from
the second bag.
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Step-by-step explanation:
The probability is 4/10.
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