$$\text { Suppose } | A | = 10 \text { and } | B | = 4 \text {. Find the number of 1-1 functions } f : A \rightarrow B \text {. }$$

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The Answer of $$\text { Suppose } | A | = 10 \text { and } | B | = 4 \text {. Find the number of 1-1 functions } f : A \rightarrow B \text {. }$$

$\text { Suppose } | A | = 10 \text { and } | B | = 4 \text {. Find the number of 1-1 functions } f : A \rightarrow B \text {. }$