GCSE Maths Practice: frequency-tables

Question 1 of 10

Estimate the total weight from a grouped frequency table.

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\( \begin{array}{l} \text{A grouped frequency table is shown. Estimate total weight.} \\ \begin{array}{|c|c|} \hline \text{Weight (kg)} & \text{Frequency} \\ \hline 0--10 & 2 \\ 10--20 & 4 \\ 20--30 & 6 \\ \hline \end{array} \end{array} \)

Choose one option:

Check each multiplication and addition carefully.

Use class midpoints, multiply by frequency, sum results for estimate.