Calculate the arithmetic mean of the following frequency distribution: \begin{tabular}{|l|c|c|c|...

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Calculate the arithmetic mean of the following frequency distribution:
\begin{tabular}{|l|c|c|c|c|c|}
\hline Class interval & \( 0-80 \) & \( 80-160 \) & \( 160-240 \) & \( 240-320 \) & \( 320-400 \) \\
\hline Frequency & 22 & 35 & 44 & 25 & 24 \\
\hline
\end{tabular}
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