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A coin is tossed 3 times. The probabilit...

A coin is tossed 3 times. The probability of getting head once and tail two times is

A

`1//3`

B

`1//4`

C

`3//8`

D

`1//2`

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The correct Answer is:
C
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DIPTI PUBLICATION ( AP EAMET)-THEORETICAL DISTRIBUTIONS-EXERCISE 1 (CHOOSE THE CORRECT ANSWER FROM THE ALTERNATIVE 1,2,3 OR 4 GIVEN )
  1. A random variable X has the probability distribution: {:(X:,1,2,3,4,...

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  2. The probability of getting exactly 2 heads when tossing 7 coins is

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  3. A coin is tossed 3 times. The probability of getting head once and tai...

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  4. If X is the number of heads getting when five coins are tossed, then m...

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  5. If X is the number of heads getting when 8 coins are tossed , then mea...

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  6. If X is the number on the die , when a die is rolled, then mean and st...

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  7. If X is the sum of the number when two dice are rolled , then mean var...

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  8. In a binomial distribution n=12, p=1//3. Then mean and variance are

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  9. Two coins whose faces are market 1 and 2 are tossed. What is mean valu...

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  10. Four bad apples are mixed accidentally with 20 good apples. Probabilit...

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  11. In a binomial distribution n=20, q=0.75. Then mean =

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  12. For binomial distribution n=10, q=0.4, then mean is

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  13. If a binomial distribution have parameters 9, 1//3 then P(X=4)=

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  14. In a binomial distribution, mean is 5 and the variance is 4 . The numb...

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  15. If the mean and variance of a binomial distribution are 15//4 and 15//...

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  16. If a binomial distribution has mean 2.4 and variance is 1.44, then n=

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  17. If a binomial distribution has mean 20 and variance is 15, then p=

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  18. In a binomial distribution n=400, p=1//5, It's standard deviation is

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  19. If for a binomial distribution the mean is 6 and the standdard deviati...

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  20. For a binomial distribution bar x=4, sigma=sqrt3 Then P(X=r)=

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