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A pair of dice is rolled twice. Let X de...

A pair of dice is rolled twice. Let X denote the number of times, 'a total of 9 is obtained'. Find the mean and variance of the random variable X.

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PRADEEP PUBLICATION-PROBABILITY-EXERCISE
  1. The random variable X can take the values 0,1,2 only. Give that P(X=0)...

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  2. Two biased dice are thrown together. For the first dice P(6)=1/2, the ...

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  3. A pair of dice is rolled twice. Let X denote the number of times, 'a t...

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  4. Let X be a discrete random variable whose probability distribution is ...

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  5. Let X be a discrete random variable whose probability distribution is ...

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  6. Let X be a discrete random variable whose probability distribution is ...

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  7. The probability distribution of a random variable X is given as under:...

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  8. The probability distribution of a random variable X is given as under:...

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  9. The probability distribution of a random variable X is given as under:...

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  10. A discrete random variable X has the following probability distributio...

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  11. A discrete random variable X has the following probability distributio...

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  12. A discrete random variable X has the following probability distributio...

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  13. A discrete random variable X has the following probability distributio...

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  14. A discrete random variable X has the following probability distributio...

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  15. Three numbers are selected at random (without replacement) from first ...

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  16. Three numbers are selected at random (without replacement) from first ...

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  17. A dice is thrown 120 times and getting '1' or '5' is considered a succ...

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  18. Find the mean and the variance of random variable X which is the numbe...

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

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

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