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An urn contains m white and n black bal...

An urn contains m white and n black balls. A ball is drawn at random and is put back into the urn along with k additional balls of the same colour as that of the ball drawn. A ball is again drawn at random. What is the probability that the ball drawn now is white ?

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A DAS GUPTA-Total Conditional Probability and Bayes' Theorem-Exercise
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  8. The probability that in a year of 22nd centurychosen at random, there ...

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  9. A bag X contains 3 white and 2 black balls; another bag Y contains 2 w...

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  11. Two persons X and Y throw two dice each. The probability that X throws...

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  13. A purse contain n coins of unknown values .a coin is drawn from it at ...

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  15. Three groups A, B and C are contesting for positions on the Board of D...

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  16. A purse containing16 notes, four each of denominations Rs 10, Rs 20, R...

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  17. An urn contains m white and n black balls. A ball is drawn at random ...

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  18. A bag contains p white and q red balls. m(m < p,m < q) balls are drawn...

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  19. A box contains N coins, m of which are fair and the rest are biased. T...

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  20. For a student to qualify, he must pass at least two out of three exams...

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