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An urn contains 5 blue and an unknown nu...

An urn contains 5 blue and an unknown number x of red balls.Two balls are drawn at random. If the probability of both of them being blue is 5/14 find x.

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MCGROW HILL PUBLICATION-PROBABILITY-Exercises (Numerical Answer)
  1. Let A and B be two events of random experiment such that P(A') = 0.3, ...

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  2. A speaks 3 out of 5 times. He throws an unbiased die and reports it is...

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  3. An urn contains 5 blue and an unknown number x of red balls.Two balls ...

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  4. If P(AcapB)=7/10 and P(B)=17/20,then P(A/B) equals to

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  5. If P(A nnB)=1/2 and P(A' nn B')=1/3, P(A)=2p and P(B)=p , then the val...

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  6. Suppose A and B are two events such that P(A|B)=0.6, P(B|A)=0.3 , P(A)...

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  7. A problem is given to three students whose chances of solving it are ¼...

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  8. Suppose A and B are two events such that P(A)=1/4, P(B)=1/3 and P(AnnB...

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  9. Let A and B be two events, the probability that at least one of them o...

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  10. The probability that A speaks truth is 5/6, while this probability for...

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  11. There are 2m persons sitting in a row. Two of them are selected at ran...

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  12. Let S={{:[(a,b),(c,d)]:a,b,c,d in {0,1}:}} A matrix A is picked up at ...

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  13. Three boxes B1, B2 and B3, have the following composition of white an...

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  14. Let A,B and C be three events such that P(A)=0.50, P(B)=0.40, P(A nn...

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  15. E and F be two independent events such that P(E) lt P(F). The probabil...

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  16. Let A and B be two events such that P(A) = 1/3, P(B) = 1/4 and P( A nn...

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  17. Three numbers are chosen from the set {1, 2, 3, ..., 40} at random wit...

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  18. A random variable X has the following probability distribution: ...

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  19. If P(B)=3/4, P(AnnBnnbarC)=1/3 and P(barAnnBbarC)=1/3 then P(BnnC)=

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  20. A pair of fair dice is rolled together till a sum of 7 or 11 is obtain...

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