A bag contains 4 white and 5 black balls. Another bag contains 9 white and 7 black balls.

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asked Mar 31, 2018 in Class XII Maths by nikita74 (-1,022 points)
A bag contains 4 white and 5 black balls. Another bag contains 9 white and 7 black balls. A ball is transferred from the first bag to the second and then a ball is drawn at random from the second bag. Find the probability that the ball drawn is white.

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answered Mar 31, 2018 by vijay Premium (534 points)

Let E1 is the event that ball transferred from the first bag is white and E2 is the event that the ball transferred from the first bag is black .
Also, E is the event that the ball drawn from the second bag is white    

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