GCSE Maths Practice: frequency-tables

Question 6 of 10

Estimate the total height from a grouped frequency table.

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\( \begin{array}{l} \text{Estimate the total height from the grouped frequency table:} \\ \begin{array}{|c|c|} \hline \text{Height (cm)} & \text{Frequency} \\ \hline 100--120 & 3 \\ 120--140 & 5 \\ 140--160 & 4 \\ \hline \end{array} \end{array} \)

Choose one option:

Double-check each multiplication and summation carefully.

Multiply midpoints by frequency, sum results for total height.