Page 259 - ICSE Math 8

Solution: (a) The given bar graph represents the number of students wearing shoes of different
numbers out of a total of (500 + 300 + 400 + 800 + 500 + 100 + 400) 3,000 selected
students.
(b) Students wear shoes of numbers 4, 5, 6, 7, 8, 9 and 10.
(c) Shoe number 7 is worn by maximum number of students. There are 800 students wearing it.
(d) Shoe number 9 is worn by minimum number of students. There are 100 students wearing it.

Example 6: Draw a double bar graph for the following data.

School School A School B School C

Number of children 40 55 15
who prefer walking
Number of children 45 25 35
who prefer cycling

Solution: The sets of frequencies that represent
the modes of transport used by the Y Scale:
students of school A, B and C are shown Y-axis: 1 cm = 10 children
by bars shaded differently on x-axis. → Cycling
The number of children are placed on 60 → Walking
y-axis. 50

Take the scale for y-axis as: 1 cm = 10 40
children Number of children 30
20
10
X
0 School School School
A B C
Mode of transport

EXERCISE 23.3

1. Study the following bar graph and answer the following questions.

(a) What is the information given
in the double bar graph? Y
→ 2006–2007
(b) In which subject has the 80 → 2007–2008
performance improved the 70
most? 60

(c) In which subject has the 50
performance deteriorated? Marks obtained by a student 40
30
(d) In which subject is the 20
performance at par? 10

(e) What is the difference in the 0 Maths Social Science English Hindi X
average scores for the year Science
2006–2007 and 2007–2008? Subjects

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