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One mapping is selected at random from a...

One mapping is selected at random from all mappings of the set `S={1,2,3,.... n}` into itself. If the probability that the mapping is one-one is 3/32, then the value of `n` is `2` b. `3` c. `4` d. none of these

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CENGAGE PUBLICATION-PROBABILITY-All Questions
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  10. Let A and B be two events such that p( bar (AuuB))=1/6, p(AnnB)=1/4 a...

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

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

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  13. Let A ,B ,C ,D be independent events such that P(A)=1//2,P(B)=1//3, P(...

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  14. A sample space consists of 3 sample points with associated probabili...

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