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There are 3 bags which are known to contain 2 white and 3 black, 4 white and 1 black, and 3 white and 7 black ball, respectively. A ball is drawn at random from one of the bags and found to the black ball. Then the probability that it was drawn from the bag containing the most black ball is `7//15` b. `5//19` c. `3//4` d. none of these

A

`7//15`

B

`5//19`

C

`3//4`

D

none of these

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A
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OBJECTIVE RD SHARMA ENGLISH-PROBABILITY -Chapter Test
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  2. 3 mangoes and 3 apples are in a box. If 2 fruits are chosen at random,...

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  3. There are 3 bags which are known to contain 2 white and 3 black, 4 ...

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  4. Among the workers in a factory only 30% receive bonus and among those ...

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  5. If two events Aa n dB are such that P(A^o)=0. 3 ,P(B)=0. 4 ,a n dP(...

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  6. An almirah stores 5 black and 4 white socks well mixed. A boy pulls ou...

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  7. There are 4 white and 4 black in a bag and 3 balls are drawn at random...

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  8. Cards are drawn one-by-one at random from a well-shuffled pack of 52 ...

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  9. Five different objects A1,A2,A3,A4,A5 are distributed randomly in 5 pl...

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  10. A father has 3 children with at least one boy. The probability that he...

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  11. Out of 13 applicants for a job, there are 5 women and 8 men. It is des...

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  12. A box contain 100 tickets numbered 1, 2,......, 100. Two tickets are c...

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  13. A wire of length l is cut into three pieces. Find the probability that...

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  14. If x in [0,5], then what is the probability that x^2 - 3x + 2 > 0

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  15. If ain[-20, 0], find the probability that the graph of the function y=...

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  16. The probability that A can solve a problem is 2//3 and B can solve it ...

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  17. A bag contains (2n+1) coins. It is known that n of these coins have a ...

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  18. Five boys and three girls are seated at random in a row. The probabili...

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  19. A and B are two independent events such that P(A)=(1)/(5), P(A cup B)=...

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  20. A and B are two independent events such that their probabilities are (...

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