13.2.3 Statistics (I), PT3 Focus Practice


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)
Sales in May = 1 4 ×8 =2


(b)
Total number of books sold before April
= (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)
First week = 2000 2000+1500+2500+4000 × 360 o = 2000 10000 × 360 o = 72 o Fourth week = 4000 10000 × 360 o = 144 o




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