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Let A={1,2,3,4,5}, B={1,2,3,4) and f:A r...

Let A={1,2,3,4,5}, B={1,2,3,4) and `f:A rarr B` is a function, the

A

number of onto functions, if n(f(A))=4 is 24

B

number of onto functions, if n(f(A))=3 is 600

C

number of onto functions, if n(f(A))=2 is 180

D

number of onto functions, if n(f(A))=1 is 4

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The correct Answer is:
A, B, C, D
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