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Three letters are written to different persons and addressess to three envelopes are also written. Without looking at the addresses, the probability that probability that the letters go into right envelopes, is

A

`(1)/(27)`

B

`1/6`

C

`1/9`

D

none

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The correct Answer is:
B
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ML KHANNA-PROBABILITY-Self Assessment Test
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  2. Two independent events are always mutually exclusive.

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  6. A fair coin is tossed repeatedly. If tail appears on first four tosses...

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  7. There are three works,one consisting of 3 volumes, one of 4, and the o...

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  8. A bag contains 4 white, 5 red and 6 black balls. Three are drawn at ra...

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  9. An urn contains 11 balls numbered from 1 to 11. if a ball is selected ...

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  10. The probability that a certain beginner at golf gets a good shot if he...

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  11. The probability that in the toss of two dice we obtain the sum 7 or 11...

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  12. Two dice are thrown. The probability that the sum of the points on two...

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  13. Two dice are thrown simultaneosly. The probability of obtaining a tota...

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  14. A can solve 75% of the problems of Mathematics and B can solve 70%. Wh...

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  15. A room has three lamp sockets. From a collection of 10 light bulbs of ...

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  16. One of the two events must occur. If the chance of one is 2/3 of th...

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  17. An arbitrary cube has four blank faces, one face marked 2 and another ...

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  18. An experiment succeeds twice as often as it fails. Find the probabi...

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  19. The probability that a marksman will hit a target is given as (1)/(5)....

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  20. The probability that a man can hit a target is 3//4. He tries 5 times....

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