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Four persons are selected at random from...

Four persons are selected at random from a group of 3 men, 2 women and 4 children. The probability that exactly two of them are children is

A

`3/4`

B

`10/23`

C

`1/2`

D

`10/21`

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A, B, D
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SURA PUBLICATION-INTRODUCTION OF PROBABILITY THEOREM-EXERCISE 12.5
  1. Four persons are selected at random from a group of 3 men, 2 women and...

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  2. A number is selected from the set {1, 2, 3,.., 20}. The probability Th...

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  3. A, B and C try to hit a target simultaneously but independently. Their...

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  4. If A and B are any two events, then the probability that exactly one o...

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  5. Let A and B be two events such that P(bar(A uu B)) = 1/6, P(A nn B) = ...

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  6. Two items are chosen from a lot containing twelve items of which four ...

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  7. A man has 3 fifty rupees notes, 4 hundred rupees notes and 6 five hund...

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  8. A letter is taken at random from the letters of the word 'ASSISTANT' a...

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  9. A matrix is chosen at random from a set of all matrices of order 2, wi...

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  10. A bag contains 5 white and 3 black balls. Five balls are drawn success...

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  11. If A and B are two events such that A sub Band P(B) ne 0, then which o...

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  12. A bag contains 6 green, 2 white, and 7 black balls. If two balls are ...

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  13. If X and Y be two events such that P(X//Y) = 1/2, P(Y//X) = 1/3 and P(...

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  14. An urn contains 5 red and 5 black balls. A ball is drawn at random, it...

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  15. A number x is chosen at random from the set {1,2,3,4, ………., 100}. Defi...

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  16. If two events A and B are independent such that P(A) = 0.35 and P(A uu...

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  17. If two events A and B are such that P (barA) = 3/10 and P(A nn barB) =...

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  18. If A and B are two events such that P(A) = 0.4, P(B) = 0.8 and P(B//A)...

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  19. There are three events A, B and C of which one and only one can happen...

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  20. If a and b are chosen randomly from the set {1, 2, 3, 4} with replacem...

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