Let \( A=\{1,2,3 \ldots n\}, B=\{a, b, c\} \), then the number
of function from \( A \) to \( B .... VIDEO
Let \( A=\{1,2,3 \ldots n\}, B=\{a, b, c\} \), then the number
\( \mathrm{P} \)
of function from \( A \) to \( B \) that are onto is
(1) \( 3^{n}-3\left(2^{n}-1\right) \)
(2) \( 3^{n}-2^{n} \)
(3) \( 3\left(2^{n}-1\right) \)
(4) \( (n-1) \) !
.
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