1.

If the set a contains 5 elements and the set b contains 6 elements then the number of one one and onto mapping from a to b is

Answer»

⇒  Number of elements in set A=n(A)=5
⇒  Number of elements in set B=n(B)=6
As, the number of bijection from A into B can only be possible when provided n(A)≥n(B).
But here, we can see, n(A)<n(B)
So, the number of bijection i.e. one-one and onto mappings from A to B=0



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