Probability 3 Question 32
32. Urn contains 6 red and 4 black balls and urn contains 4 red and 6 black balls. One ball is drawn at random from urn and placed in urn . Then, one ball is drawn at random from urn and placed in urn . If one ball is drawn at random from urn , the probability that it is found to be red, is….
(1988, 2M)
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Solution:
- Let
be drawing a red ball and for drawing a black ball, then required probability