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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)/(126)`

B

`(1)/(630)`

C

`(1)/(1260)`

D

`(1)/(2520)`

Text Solution

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The correct Answer is:
(c)
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ARIHANT MATHS-PROBABILITY-Exercise For Session 1
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  2. A die is thrown three times and the sum of the 3 numbers shown is 15. ...

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  3. Three faces of a fair die are yellow, two faces red and one blue. The ...

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  4. A speaks truth in 75% of cases and B in 80% of cases. The percentage o...

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  5. An unbiased die with faced marked 1, 2, 3, 4, 5, and 6 is rolled four ...

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  6. Three numbers are chosen at random without replacement from {1,2,3,......

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  7. Seven white and 3 black balls are placed in a row. What is the probabi...

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  8. Two numbers are selected randomly from the set S={1,2,3,4,5,6} without...

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  9. If (1+3p)/3,(1-p)/1,(1-2p)/2 are the probabilities of 3 mutually exclu...

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  10. Three identical dice are rolled. The probability that same number appe...

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  11. If the letters of the word ASSASSIN are written down in a row, the pro...

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  12. A box contains 2 black, 4 white, and 3 red balls. One ball is drawn at...

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  13. If three distinct numbers are chosen randomly from the first 100 natur...

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  14. There are 2 vans each having numbered seats, 3 in the front and 4 at t...

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  15. A and B stand in a ring with 10 other persons. If the arrangement of t...

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  16. The first 12 letters of English alphabet are written down at random in...

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  17. Six boys and six girls sit in a row randomly. Find the probability tha...

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  18. If from each of the three boxes containing 3 white and 1 black, 2 whit...

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  19. The probability that an year chosen at random has 53 Sundays is :

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  20. if letters of the word MATHEMATICS are arranged then the probability t...

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