CBSE Class 8 Answered
To show this information in a pie chart, follow the steps given below.
Work out the total number of pupils: 7 + 11 + 6 + 4 + 2 = 30
To work out the angle of each segment, work out the fraction of the total for each grade.
Fraction for grade A =
There are 360° in a full turn, so to work out the angle, multiply the fraction by 360o: × 360 = 84°
Angle made by the sector representing grade A is 84°
Repeat this process to find the angle of the sectors for the other grades
Grade |
Frequency |
Angle |
A |
7 |
|
B |
11 |
|
C |
6 |
|
D |
4 |
|
E |
2 |
|
The steps to draw the pie chart are as follows:
1) Draw a line segment xy. Make an angle of 84o with xy. This sector will correspond to grade A.
2) Continue making the sectors B, C, D and E to obtain the required pie chart.