The mean of following frequency table is 50 .
\begin{tabular}{|c|c|}
\hline Class & Frequency \\...
The mean of following frequency table is 50 .
\begin{tabular}{|c|c|}
\hline Class & Frequency \\
\hline \( 0-20 \) & 17 \\
\( 20-40 \) & \( \mathrm{f}_{1} \) \\
\( 40-60 \) & 32 \\
\( 60-80 \) & \( \mathrm{f}_{2} \) \\
\( 80-100 \) & 19 \\
\hline Total & 120 \\
\hline
\end{tabular}
The missing frequencies are :
(A) 28,24
(B) 24,36
(C) 36,28
(D) none of these
\( \mathrm{W} \)
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