Question

Read the graph and fill in the following:

The average number of books sold from April to June is______.

Answer 1

Given that,

Number of books sold in April$=900$

Number of books sold in May$=700$

Number of books sold in June$=1000$

According to the question,

$$\begin{gathered} \mathrm{Average}=\frac{\mathrm{Sum}\mathrm{of}\mathrm{all}\mathrm{the}\mathrm{observations}}{\mathrm{Number}\mathrm{of}\mathrm{all}\mathrm{observations}} \\ =\frac{900+700+1000}{3} \\ =\frac{2600}{3} \\ =866.66 \end{gathered}$$

Hence, the average number of books sold from April to June is $866.66$.