Question

20. Consider the marks obtained out of 100 obtained by 50 students of a class in periodic
test 2 is given as below.
Marks
0-20
20-40
40-60
60-80
80-100
Number of 5
10
10
11
students
Draw a Histogram and frequency polygon representing the data.
14​

Answer 1

Drawing histogram and frequency polygon for the given data

• A histogram is a bar graph which represents frequency distribution.
• Take marks on X-axis and number of students on Y-axis
• Now, draw vertical rectangles with width equal to the class interval and height equal to corresponding frequencies of the class.
• Join the midpoints of these bars using ruler. This is your frequency polygon for the given frequency distribution.