**Question 7**:

Diagram below is an incomplete pictograph showing the sales of books for a duration of five months.

(a) The sales in May is ¼ of the total sales in January and February.

Complete the pictograph in the Diagram.

(b) Find the total number of books sold before April.

**Solution**:**(a)**

$\begin{array}{l}\text{SalesinMay}\\ =\frac{1}{4}\times 8\\ =2\end{array}$

**Total number of books sold before April**

(b)

(b)

= (5 + 3 + 6) × 15

= 14 × 15

= 210

**Question 8**:

Diagram below shows an incomplete line graph of the number of eggs sold in four weeks. The number of eggs sold on week 1 is 2000 and 4000 on week 4.

(a) Complete the line graph in the Diagram.

(b) Complete the pie chart in the second Diagram to represent sales from Week 1 to Week 4.

**Solution**:**(a)**

**(b)**

$\begin{array}{l}\text{Firstweek}\\ =\frac{2000}{2000+1500+2500+4000}\times {360}^{o}\\ =\frac{2000}{10000}\times {360}^{o}\\ ={72}^{o}\\ \\ \text{Fourthweek}\\ =\frac{4000}{10000}\times {360}^{o}\\ ={144}^{o}\end{array}$