Page 185 - Start Up Mathematics_6

Now answer the following questions:
(a) What information does the bar graph 100
90
give? 80
60
(b) Name the subjects in which Rehman Marks 70
50
scored maximum and minimum marks. 40
30
(c) What scale is used to draw the bar 20
10
graph? 0 Hindi English Maths Science Social
(d) List the marks obtained in each subject. Subjects Studies
Solution: (a) This bar graph shows the marks
obtained by Rehman in various subjects.
(b) Rehman scored maximum and minimum marks in Mathematics and Social
Studies respectively.
(c) The scale used: 1 unit length = 10 marks
(d) Hindi – 70, English – 80, Mathematics – 90, Science – 60, Social Studies – 50
Example 10: A survey of 120 school students was Preferred activity Number of students
done to find which activity they prefer Playing 45
to do in their free time. Reading story books 30
(a) Draw a bar graph mentioning steps Watching TV 35
of construction to illustrate the Listening to music 10
given data taking scale of 1 unit Dancing 20
length = 5 students.
(b) Which activity is preferred by most of the students other than playing?
Solution: (a) To represent the data in the form of a bar diagram, we follow these steps:
(i) Draw two perpendicular lines, one vertical and one horizontal.
(ii) Along the horizontal line, mark the activities and along the vertical line,
mark the number of students.
(iii) Take bars of equal width keeping a uniform gap between them.
(iv) Since 1 unit length = 5 students. The heights of the bars is found by dividing
the number of students in the activity by 5, for example the height of the
30
bar representing 30 students reading story books = = 6 units.
5
1 unit length = 6 students
50
45
40
Number of students 30
35
25
20
15
10
5
0
Playing Reading Watching Listening to Dancing
story books TV music
Preferred activity
(b) Other than playing, students prefer watching TV.

177