Identify the median class using cumulative frequencies.
\( \begin{array}{l}\text{Find the median class of the data below:} \\ \begin{array}{|c|c|}\hline \text{Class} & \text{Frequency} \\ \hline 0 - 10 & 4 \\ 10 - 20 & 6 \\ 20 - 30 & 10 \\ 30 - 40 & 5 \\ \hline\end{array}\end{array} \)
Choose one option:
Check cumulative totals carefully to locate median class.
Add frequencies cumulatively and find the class containing the median position.
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