Data Collection, Frequency and Frequency Tables

Calculate the cumulative frequency, and fill in the value below

$\begin{array}{cc}\text{Number of Pets}& \text{Frequency}\\ \text{1 – 2}& \text{10}\\ \text{3 – 4}& \text{5}\\ \text{5 – 6}& \text{3}\\ \text{7 – 8}& \text{1}\end{array}$

The cumulative frequency at 3 – 4 pets is

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