If $A = {11, 12, 13, 14}$ and $B = {6, 8, 9, 10}$ then the number of bijections defined from $A$ to $B$ is

256

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24

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16

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64

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Solution

The correct option is A $24$
No of bijections from $A$ to $B$
$= 4 \times 3 \times 2 \times 1$
$= 24$

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