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An unbiased coin is tossed 4 times. Find...

An unbiased coin is tossed 4 times. Find the mean and variance of the number of heads obtained.

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MODERN PUBLICATION-PROBABILITY-EXERCISE
  1. Calculate P(r) for r=1,2,3,4 and 5 by using the recurrence formula of ...

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  2. Five dice are thrown 729 times. How many times do you expect that at l...

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  3. An unbiased coin is tossed 4 times. Find the mean and variance of the ...

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  4. If the mean and variance of a binomial distribution are 9 and 6 respec...

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  5. The sum of mean and variance of a binomial distribution of 18 trials i...

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  6. If the sum of the mean and variance of a binomial distribution of 5 tr...

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

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  8. If the sum of mean and variance of a binomial distribution is 1.8 for ...

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

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  10. Find the binomial distribution whose: mean is 4 and variance is 3.

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  11. Find the binomial distribution whose: mean is 9 and variance is 6.

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

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

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  14. 10 coins are tossed at random. Obtain the mean and variance of the num...

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

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

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

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

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

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

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