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Find the mean and variance of the probab...

Find the mean and variance of the probability distribution of the number of sixes in three tosses of a die.

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MODERN PUBLICATION-PROBABILITY-EXERCISE
  1. Find the mean and variance of the number obtained on a throw of an unb...

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  2. Let X denote the sum of the numbers obtained when two fair dice are ro...

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  3. Find the mean and variance of the probability distribution of the numb...

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  4. Find the probability distribution of number of doublets in three throw...

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  5. Two cards are drawn simultaneously ( without replacement) from a well-...

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  6. Two cards are drawn simultaneously (or successively without replacemen...

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  7. Two cards are drawn successively with replacement from a well-shuffled...

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

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

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

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

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

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

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

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

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

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

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

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

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

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