Q. 325.0( 1 Vote )

One mapping is se

Answer :

We know that the no of mapping from a set A to same set containing n elements = nn


As each element have n options to be mapped with n elements.


For mapping selected to be one to one, for first element we have n options ,for second we have n-1 options an so on…


total such mappings = n × (n-1)× (n-2)× … = n!


P(mapping is one to one) =


Our answer matches with option (c)


Option (c) is the only correct choice

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