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An urn contains 2 white and 2 black ball...

An urn contains 2 white and 2 black balls. A ball is drawn at random. If it is white, it is not replace into urn, otherwise it is replaced along with another ball of the same colour. The proccess is repeated, find the probability that the third ball drawn is black.

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PRADEEP PUBLICATION-PROBABILITY-EXERCISE
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  3. An urn contains 2 white and 2 black balls. A ball is drawn at random. ...

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  8. Bag I contains 3 black and 2 white balls, Bag II contains 2 black and ...

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  9. Find the probability of drawing one rupee coin from a purse with two c...

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  10. Three bags A,B and C contain 6 red, 4 black and 5 red, 5 black balls a...

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  11. There are three urns containing 2 white and 3 black balls, 3 white and...

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  12. There are two bags I and II. Bag I contains 4 white and 3 red balls wh...

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  13. A bag X contains 4 white balls and 2 black balls, while another bag Y ...

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  14. The contents of three bags A, B and C are as follows: Bag A: 1 white, ...

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