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Find the mean and variance of the number...

Find the mean and variance of the number of heads on the throw of three coins.

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MODERN PUBLICATION-PROBABILITY-EXERCISE
  1. Two cards are drawn successively with replacement from a well-shuffled...

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  2. A coin is tossed 4 times. Let X denote the number of heads. Find the p...

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  3. Find the mean and variance of the number of heads on the throw of thre...

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  4. Two numbers are selected at random (without replacement) from the firs...

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  5. Two bad eggs are mixed accidently with 10 good ones. Find the probabil...

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  6. A class has 15 students whose ages are 14, 17, 15, 14, 21, 17, 19, 20,...

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  7. There are 40 scholars in a class, out of which 10 are sports- persons....

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  8. The probability distribution of a random variable 'X', taking values 1...

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  9. The probability distribution of a random variable 'X', taking values 1...

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  10. The probability distribution of a random variable 'X', taking values 1...

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  11. From a lot of 15 bulbs which include 5 defectives, a sample of 4 bulbs...

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  12. Find the probability distribution of white balls drawn when 3 balls ar...

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  13. Two numbers are selected at random (without replacement) from the firs...

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  14. An urn contains 3 white and 6 red balls. 4 balls are drawn one by one ...

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  15. Obtain binomial distribution, if : n=6, p=1/3.Find the mean

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  16. Obtain binomial distribution, if : n=5, p=1/6

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  17. Suppose X has a binomial distribution B(6,(1)/(2)) . Show that X=3 is ...

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  18. A coin is tossed 7 times. What is the probability that head appears on...

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  19. A coin is tossed 7 times. What is the probability that tail appears on...

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  20. A coin is tossed 5 times. What is the probability that head appears on...

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