The following bar graph (Fig. 23.14) represents the heights (in cm) of 50 students of
Class XI of a particular school. Study the graph and answer the following questions:
20
15
Number of students
10
5 0
X
160 164 165
140 144 145 149 150 154 155 159
Heights (in cm.)
Fig. 23.14
(i) What percentage of the total number of students have their heights more than
149 cm?
(ii) How many students in the class are in the range of maximum height of the
class?
(iii) The school wants to provide a particular type of tonic to each student below
the height of 150 cm to improve his height. If the cost of the tonic for each
student comes out to be 55, how much amount of money is required?
(iv) How many students are in the range of shortest height of the class?
(v) State whether true or false:
(a) There are 9 students in the class whose heights are in the range of 155_
159 cm
(b) Maximum height (in cm) of a student in the class is 17.
(c) There are 29 students in the class whose heights are in the range of 145–
154 cm
(d) Minimum height (in cm) of a student is the class is in the range of 140-144 cms.
(e) The number of students in the class having their heights less than 150 cm
is 12.
(f) There are 14 students each of whom has height more than 154. cm.
Read the following har graph (Fig 23.15) and answer the following questions:
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