Page 121 - Ganit Kaushal

to enhance clarity and communication by presenting information in a visually attractive and engaging manner,
ensuring it captures attention and conveys insights quickly and effectively.

Note

As we know, the width of the bar is not considered, here too, the width of the base of the triangle should
not be considered. One should not get confused that higher mountains are wider too, as in this infographic,
the taller triangles are wider.

Exercise 4.2

1. The bar graph shows the heights of 50 students of Class X of a school. Observe the graph and answer
the following questions.
(a) How many students have heights more than 154 cm?

(b) How many students in the class are in the range
of the minimum height of the class?
(c) How many students are in the range of the
maximum height of the class?
(d) To improve the height of all the students who have
a height less than 150 cm, the school management
is going to give a tonic that costs them `165
per student. How much money does the school
management have to spend on such students?
(e) State whether true or false:
(i) The maximum number of students is in the
height group of 150-154 cm.
(ii) There are 12 students whose heights are in the range of 155-159 cm.
(iii) There are 28 students in the class whose heights are in the range of 145-154 cm.

(iv) The minimum possible height of a student in the class is 140 cm.
(v) The maximum possible height of a student in the class is 154 cm.
(vi) The number of students in the class having a height less than 150 cm is 20.
(vii) There are 14 students, each of whom has a height of more than 154 cm.

Data Handling and Presentation 119