We have the following:
In this case, what we must do is calculate the weighted average, as follows:
[tex]\begin{gathered} m=\frac{14\cdot20800+10\cdot23600+16\cdot25300+3\cdot30700+6\cdot38700+1\cdot149300}{14+10+16+3+6+1} \\ m=\frac{1405600}{50} \\ m=28112 \end{gathered}[/tex]The mean salary is $28112