Illustration 6
Represent the following data by means of a histogram.
\begin{tabular}{|c|c|c|c|}
\hline Weekly wages (in ₹) & No. of workers & Weekly wages (in ₹) & No. of workers \\
\hline \( 10-15 \) & 7 & \( 30-40 \) & 12 \\
\hline \( 15-20 \) & 19 & \( 40-60 \) & 12 \\
\hline \( 20-25 \) & 27 & \( 60-80 \) & 8 \\
\hline \( 25-30 \) & 15 & & \\
\hline
\end{tabular}
