1.

A binary operation is chosen at random from the set of all binary operations on a set A containing n elements. The probability that the binary operation is commutative is

Answer»

`(N^(n))/(n^(n)^(2))`
`(n^(n//2))/(n^(n)^(2))`
`((n)^(n//2))/(n^((n^(2))//(2))`
none

Answer :C


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