Answer:
The average number of hours spent preparing is;
[tex]3.8\text{ hours}[/tex]Explanation:
Given the figure in the attached image.
we want to calculate the average number of hours spent preparing.
[tex]\text{Average = }\frac{\text{ sum of all the data}}{\text{ total number of data}}[/tex]So using the figure provided;
[tex]\begin{gathered} \text{Average =}\frac{2(0)+2(1)+1(2)+1(3)+4(4)+2(5)+4(7)}{16} \\ \text{Average = }\frac{61}{16} \\ \text{Average = 3.8 (to the nearest tenth)} \end{gathered}[/tex]Therefore, the average number of hours spent preparing is;
[tex]3.8\text{ hours}[/tex]