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




13.2.2 Statistics (I), PT3 Focus Practice


13.2.2 Statistics (I), PT3 Focus Practice

Question 4:
Table below shows the profit made from the sales of coconut at a stall over five days.
 
Day
Day 1
Day 2
Day 3
Day 4
Day 5
Profit (RM)
280
200
200
360
320
On diagram in the answer space, draw a line graph to represent all the information in the Table. Use the scale 2 cm to RM80 on the vertical axis.

Answer
:

Solution:




Question 5:
Table below shows the number of students who read four types of books.

Types of books
Fiction
Language
Technology
Religion
Number of students
18
16
8
14
On diagram in the answer space, draw a bar chart to represent all the information in the Table.

Answer
:
Solution:

Question 6:
Diagram below is an incomplete bar chart which shows the number of cars sold in a shop for duration of five months.
(a) The number of cars sold for the five months is 150 units. The number of cars sold in February is equal to the number of cars sold in April.
Complete the bar chart in the Diagram.
(b) Find the percentage of cars sold in January.

Solution:
(a)
(b)
Percentage of cars sold = 45 150 ×100% =30%



13.2.1 Statistics (I), PT3 Focus Practice


13.2.1 Statistics (I), PT3 Focus Practice
Question 1:
Diagram below is a pictograph showing the number of pizzas sold in three months.
 
The price of one pizza is RM18. The total sales for those four months are RM2250.
Calculate the number of pizzas sold in April.

Solution
:
Total number of pizzas sold in four months
= R M 2250 R M 18 = 125

Total number of pizzas sold in first three months
= 9 × 10
= 90

Number of pizzas sold in April
= 125 – 90
= 35


Question 2:
Diagram below is a bar chart showing the number of new houses sold over four days.
 

The total number of new houses sold on Wednesday and Thursday is 56.
Calculate the total number of new houses sold on Monday and Tuesday.

Solution
:
Wednesday: 12 units
Thursday: 16 units
Number of houses represented by 1 unit
= 56 12+16 =2
Monday: 14 units
Tuesday: 18 units

Total number of new houses sold on Monday and Tuesday
= (14 + 8) × 2
= 64


Question 3:
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