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Find the expected number of boys in a fa...

Find the expected number of boys in a family with 8 children, assuming the sex distribution to be equally probable.

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RD SHARMA ENGLISH-BINOMIAL DISTRIBUTION -All Questions
  1. If on an average 9 ships out of 10 arrive safely to ports, find the me...

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  2. In eight throws of a die 5 or 6 is considered a success, find the mean...

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  3. Find the expected number of boys in a family with 8 children, assuming...

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  4. A die is thrown thrice. A success is 1 or 6 in a throw. Find the mean ...

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  5. A pair of dice is thrown 4 times. If getting a doublet is considere...

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  6. From a lot of 15 bulbs which include 5 defectives, a sample of 2 bulbs...

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  7. Three cards are drawn successively with replacement from a well shu...

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  8. In a binomial distribution, if n=20 ,\ q=0. 75 ,then write its mean.

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  9. A binomial distribution has mean 5 and variance 4. Find the number of ...

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  10. In a group of 200 items, if the probability of getting a defective ite...

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  11. If the mean of a binomial distribution is 20 and its standard deviatio...

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  12. The mean of a binomial distribution is 10 and its standard deviation i...

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  13. The mean and variance of a random variable X having a binomial distrib...

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  14. If the mean and variance of a binomial variable X are 2 and 1 respecti...

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  15. If in a binomial distribution n=4 \ and \ P(X = 0) = (16)/(81), find q...

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  16. Find the binomial distribution for which the mean is 4 and variance 3.

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  17. If for a binomial distribution P(X=1)=P(X=2)=alpha, \ write \ P(X=4) i...

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  18. A fair coin is tossed four times. Let X denote the number of heads ...

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  19. If X follows Binomial distribution with parameters n=5, p and P(X=2)=9...

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  20. In a box containing 100 bulbs, 10 are defective. The probability th...

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