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Previous Year Question (PYQs)



If $f$ is a function from a finite set $A$ having $10$ elements to a finite set $B$ having $5$ elements, then number of functions from $A$ to $B$ is …





Solution

Each of $10$ elements in $A$ can be mapped to any of $5$ elements in $B$. Hence total functions $= 5^{10}$.


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