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Suppose n ( >=3) persons are sitting in ...

Suppose `n ( >=3)` persons are sitting in a row. Two of them are selected at random. The probability that they are not together is (A) `1- 2/n` (B) `2/(n-1)` (C) `1- 1/n` (D) nonoe of these

A

`1-(2)/(n)`

B

`(2)/(n-1)`

C

`1-(1)/(n)`

D

none of these

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OBJECTIVE RD SHARMA ENGLISH-PROBABILITY -Section I - Mcqs
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  2. A four figure number is formed of the figures 1, 2, 3, 4, 5 with no ...

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  3. Suppose n ( >=3) persons are sitting in a row. Two of them are selecte...

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  4. India play two matches each with West Indies and Australia. In any ...

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  5. In shuffling a pack of 52 playing cards, four are accidently droppe...

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  6. If A and B are independent events such that P(A) gt0, P(B) gt 0, then

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  7. If A and B are independent events such that P(A) gt 0, P(B) gt 0, then

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  8. Twelve balls are distributed among three boxes, find the probability ...

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  9. A committee of five is to be chosen from a group of 9 people. The prob...

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  10. The probability of two events A and B are 0.25 and 0.50 respectivel...

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  11. about to only mathematics

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  12. A bag contains four tickets marked with numbers 112,121,211, and 222. ...

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  13. A box contains 2 balck, 4 white, and 3 balls. One ball is drawn at ran...

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  14. A student appears for tests I, II and III. The student is considered s...

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  15. A cricket club has 15 members, of them of whom only 5 can bowl. If the...

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  16. If (1 + 3p)/(3), (1 - p)/(4) and (1 - 2p)/(2) are the probabilities of...

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

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  18. Three numbers are chosen from 1 to 30. The probability that they are n...

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  19. The probability that an event A happens in one trial of an experiment,...

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  20. If two A and B such that P(A) gt 0 and P(B) ne 1, then P(barA//barB) ...

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