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  4. Let n(A)=4 and n(B)=6. Then, the number of one-one functions from A to B is

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Q. Let $n(A)=4$ and $n(B)=6$. Then, the number of one-one functions from $A$ to $B$ is

Relations and Functions - Part 2

Solution:

Given, $n(A)=4$ and $n(B)=6$
Here, $n(B)>n(A)$
Then, the number of one-one functions
$={ }^6 P_4=\frac{6 !}{2 !}=360$