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A box contains 2 black, 4 white, and 3 r...

A box contains 2 black, 4 white, and 3 red balls. One ball is drawn at random from the box and kept aside. From the remaining balls in the box, another ball is drawn at random and kept aside the first. This process is repeated till all the balls are drawn front the box. The probability that the balls drawn are in the sequence of 2 black, 4 white, and 3 red is `1//1260` b. `1//7560` c. `1//126` d. none of these

A

`1//1260`

B

`1//7560`

C

`1//126`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A

The required probability is
`=2/9xx1/8xx4/7xx3/6xx2/5xx1/4xx1xx1xx1=1/1260`
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CENGAGE-PROBABILITY II-Exercise (Single)
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  2. Let A & B be two events. Suppose P(A) = 0.4 , P(B) = p and P(AuuB)=0....

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  7. A coin is tossed 7 times. Then the probability that at least 4 consect...

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  8. Three critics review a book. Odds in favour of the book are 5:2, 4:3 ...

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  10. An unbiased cubic die marked with 1,2,2,3,3,3 is rolled 3 times. The ...

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  11. A fair die is tossed repeatedly. A wins if if is 1 or 2 on two consecu...

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  12. Whenever horses a , b , c race together, their respective probabilitie...

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  13. A man alternately tosses a coin and throws a die beginning with the...

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  14. If p is the probability that a man aged x will die in a year, then the...

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  15. Thirty two players ranked 1 to 32 are playing is a knockout tournament...

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  17. A fair coin is tossed 10 times. Then the probability that two heads do...

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  18. A die is thrown a fixed number of times. If probability of getting eve...

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  19. A pair of fair dice is thrown independently three times. The probab...

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  20. The probability that tulb produced by a factor will fuse after 150 day...

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