Question:
Mark the correct alternative in the following question:
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) none of these
Solution:
As, the number of bijection from $A$ into $B$ can only be possible when provided $n(A) \geq n(B)$
But here $n(A) So, the number of bijection i.e. one $-$ one and onto mappings from $A$ to $B=0$ Hence, the correct alternative is option (c).
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