A Company Counted the Number of Their Employees in Each

Short Answer

A company counted the number of their employees in each of the following age classes.According to this distribution,what is the average age of the employees in the company?
$$\begin{array} { | c | c | } \hline \text { Age Range } & \text { Number of Emplayees } \\\hline 20 - 24 & 8 \\\hline 25 - 29 & 37 \\\hline 30 - 34 & 25 \\\hline 35 - 39 & 48 \\\hline 40 - 44 & 27 \\\hline 45 - 49 & 10 \\\hline\end{array}$$