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A die is tossed twice. A success is gett...

A die is tossed twice. A success is getting an odd number on a random toss. Find the variance of the number of successes.

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RD SHARMA ENGLISH-MEAN AND VARIANCE OF A RANDOM VARIABLE -All Questions
  1. A fair die is tossed. Let X denote twice the number appearing. Find...

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  2. A fair die is tossed. Let X denote 1 or 3 according as an odd or an ev...

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  3. A die is tossed twice. A success is getting an odd number on a rand...

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  4. Three cards are drawn at random (without replacement) from a well shuf...

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  5. An urn contains 5 red 2 black balls. Two balls are randomly drawn, ...

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  6. Two numbers are selected are random (without replacement) from posit...

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  7. Write the values of a for which the following distribution of probabil...

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  8. Find the mean of the following probability distribution: X=xi :\ \ ...

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  9. In a single throw of a dice; if X denotes the number on its upper face...

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  10. If the probability distribution of a random variable X is given by X=x...

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  11. Find the mean of the following probability distribution: X=xi :\ \ 1 \...

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  12. If the probability distribution of a random variable X is as given bel...

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  13. A random variable X has the following probability distribution: X=xi :...

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  14. A random variable X has the following probability distribution: Values...

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  15. A random variable has the following probability ...

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  16. A random variate X takes the values 0, 1, 2, 3 and its mean is 1.3. If...

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  17. A random variable has the following probability distribution: X=xi :\...

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  18. If X is a random variable with probability distribution as given below...

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  19. The probability distribution of a discrete random variable X is given ...

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  20. For the following probability distribution: X :\ \ -4\ \ -3\ -2\ \ -1...

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