Let A and B be two finite sets having m and n elements respectively such that `m le n`. A mapping is selected at random from the set of all mappings from A to B. The probability that the mapping selected is an injection, isA. `(n !)/((n-m)!m^(n))`B. `(n!)/((n-m)!n^(m))`C. `(m!)/((n-m)!n^(m))`D. `(m!)/((n-m)!m^(n))`

Let A and B be two finite sets having m and n elements respectively su

1.	Let A and B be two finite sets having m and n elements respectively such that `m le n`. A mapping is selected at random from the set of all mappings from A to B. The probability that the mapping selected is an injection, isA. `(n !)/((n-m)!m^(n))`B. `(n!)/((n-m)!n^(m))`C. `(m!)/((n-m)!n^(m))`D. `(m!)/((n-m)!m^(n))`
Answer» Correct Answer - B

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