Question

The given line plot shows the amount of money collected as parking fees at a mall. Calculate the total amount of money collected.

Answer 1

Let’s look at the frequency of different amounts of money collected.
$\begin{array}{ccc}\text{Amout of money}& \text{Frequency}& \text{Total amount of}\\ \text{collected}\left(\$\right)& & \text{money collected}\left(\$\right)\\ \frac{2}{9}& 1& 1\times \frac{2}{9}=\frac{2}{9}\\ \frac{3}{9}& 2& 2\times \frac{3}{9}=\frac{6}{9}\\ \frac{4}{9}& 1& 1\times \frac{4}{9}=\frac{4}{9}\\ \frac{5}{9}& 1& 1\times \frac{5}{9}=\frac{5}{9}\end{array}$
Total amount of money collected.
$=\frac{2}{9}+\frac{6}{9}+\frac{4}{9}+\frac{5}{9}$
$=\frac{2+6+4+5}{9}$
$=\frac{17}{9}$
So, the total amount of money collected is $\$\frac{17}{9}$.