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A die is thrown 20 times and getting a n...

A die is thrown 20 times and getting a number 'greater than 4' is considered a success. Find the mean and the variance of the number of successes.

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MODERN PUBLICATION-PROBABILITY-EXERCISE
  1. Find the binomial distribution whose: mean is 9 and variance is 6.

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  2. If 12 dice are rolled at random, obtain the mean and variance of the d...

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  3. A die is thrown 20 times and getting a number 'greater than 4' is cons...

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  4. 10 coins are tossed at random. Obtain the mean and variance of the num...

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  5. The sum and product of the mean and variance of a binomial distributio...

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  6. A die is thrown 6 times. Find the mean and variance of the number of a...

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  7. Eight dice are rolled at random. Find the mean and variance of number...

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  8. Eight dice are rolled at random. Find the mean and variance of number ...

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  9. Two dice are rolled at random 5 times. Obtain the mean and variance of...

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  10. The mean and variance of a binomial variable X are respectively 4 and ...

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  11. If the sum of mean and variance of a binomial distribution is 4.8 for ...

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  12. A discrete random variable 'X' has mean equal to 3 and variance equal ...

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  13. A discrete random variable 'X' has mean equal to 3 and variance equal ...

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  14. Determine the binomial distribution whose mean is 10 and whose standar...

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  15. Determine the binomial distribution whose mean is 10 and whose standar...

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  16. The screws produced by a certain machine were checked by examining sam...

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  17. Given that E and F are events such that P(E) = 0.6, P(F) = 0.3 and P(E...

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  18. Compute P(A|B),if P(B) = 0.5 and P (A cap B) = 0.32

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  19. If P(A)=0.8, P(B)=0.5 and P(B/A)=0.4, find : P(AnnB)

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  20. If P(A) = 0.8, P(B) = 0.5 and P (B|A) = 0.4 find: P(A|B)

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