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Find the mean number of heads in three t...

Find the mean number of heads in three tosses of a fair coin.

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RD SHARMA ENGLISH-MEAN AND VARIANCE OF A RANDOM VARIABLE -All Questions
  1. Find the mean and variance of the number of heads in the two tosses of...

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  2. A random variable X as the following probability distribution: xi :-2-...

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  3. Find the mean number of heads in three tosses of a fair coin.

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  4. A coin weighted so that P(H)=3/4a n dP(T)=1/4 is tossed three times. L...

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  5. In roulette, fig the wheel has 13 numbers 0,1,2,...,12 marked on eq...

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  6. There are 5 cards numbered 1 to 5, one number on one card. Two cards ...

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  7. A die is tossed twice. A “success” is “getting an odd number” on a ...

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  8. From a lot of 10 items containing 3 defectives, a sample of 4 items id...

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  9. Determine which of the following can be probability distributions of a...

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  10. Determine which of the following can be probability distributions o...

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  11. Determine which of the following can be probability distributions of...

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  12. Let X denote the number of hours you study during a randomly select...

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  13. A random, variable X has the following probability distribution: X :\ ...

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  14. Find the probability distribution of X; the number of heads in two tos...

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  15. A coin is tossed until a head appears or the tail appears 4 times in s...

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  16. A coin is biased so that the head is 3 times as likely to occur as ...

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  17. State which of the following are not the probability distributions ...

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  18. Check the following distributions of probability of random variable X ...

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  19. Prove that the following distributions of probability of random vari...

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  20. Which of the following distributions of probability of random variab...

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