A mapping is select at random from the set of all the mappings of the set `A={1,2, n}` into itself. Find the probability that the mapping selected is an injection.

36.One mapping /function is selected at random from all the mappings of the set A={1,2,3,4,5) .Into itself.Find the probability that the mapping selected is one to one.

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, is

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.4d .none of these

A mapping is selected at random from set A={1, 2, ...., 10} into itself. The probability that mapping selected is an injective is

A mapping is selected at random from all mappings f:A rarr A where set A={1, 2, 3, .... n} If the probability that mapping is injective is 3/32 then the value of n is:

Find the number of all onto functions from the set A={1,2,3, ,n} to itself.

Let y={1,2,3,....25). If a student selects a function randomly from the set of all functions from x onto x, then what is the probability that the selected function maps prime numbers to prime numbers?