148. The number of surjective (onto) functions from a set with 6 elements to a set with 3 elements is which of the following? (1) $360$ (2) $450$ (3) $480$ (4) $540$
\textbf{148.} The number of surjective (onto) functions from a set with 6 elements to a set with 3 elements is which of the following?
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(1) $360$ \hfill (2) $450$ \hfill (3) $480$ \hfill (4) $540$
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