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Letters for Digits

For a functio...

Question

For a function $f : A \to B,$ if the number of elements in set $A$ and $B$ are $5$ and $3$ respectively, then the number of one-one function(s) is

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Solution

Clearly, $n (B) < n (A)$ in this case one-one function in not possible.

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Letters for Digits

Standard VIII Mathematics

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