1.

If the set A contains 5 elements and the set B contains 6 elements, then the number of one-one and onto mappings from A to B is(a)720      (b)120       (c)0    (d)NOT

Answer»

Answer:

A contains 5 elements

B contains 6 elements

Since number of elements in B is more than A there cannot be any one-one and onto mapping from A to B

So, the correct answer is (c) i.e 0



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