12.2.4 Data Handling, PT3 Focus Practice


Question 7:
Table below shows the number of companies that gave contributions to an orphan fund over a period of five days.

Days
Monday
Tuesday
Wednesday
Thursday
Friday
Number of companies
8
14
m
17
11

It is given that 20% of the total contribution was made on Tuesday.
Calculate the value of m

Solution
:
Let C = Total contribution
20 100 × C = 14 C = 14 × 100 20 = 70 m = 70 ( 8 + 14 + 17 + 11 ) = 70 50 = 20



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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