Find the mean age in years from the frequency distribution given below : \begin{tabular}{|l|c|c|...

Find the mean age in years from the frequency distribution given below :
\begin{tabular}{|l|c|c|c|c|c|c|c|}
\hline Age in years & \( 25-29 \) & \( 30-34 \) & \( 35-39 \) & \( 40-44 \) & \( 45-49 \) & \( 50-54 \) & \( 55-59 \) \\
\hline No. of persons & 4 & 14 & 22 & 16 & 6 & 5 & 3 \\
\hline
\end{tabular}