Pie Chart
Pie Chart
Pie Chart: Pie chart is a way of representing simple data for easy understanding. A pie chart consists of sectors of a circle. The size of each sector is directly perportional to the component part or information it represents.
Central angle for a component = (FREQUENCY/TOTAL FREQUENCY) 360
PIE CHART Construction:
Example: There are 216 workers in a factory as per list given below:
| Cadre | Labourer | Mechanic | Fitter | Supervisor | Clerk |
|---|---|---|---|---|---|
No. of Workers | 75 | 60 | 36 | 27 | 18 |
Represent the above data by a pie chart.Solution:Total number of workers = 216.
Calculation of Central Angles
| Cadre | No. of Workers | Central Angle |
|---|---|---|
Labourer | 75 | (75/216 × 360)° = 125° |
Mechanic | 60 | (60/216 × 360)° = 100° |
Fitter | 36 | (36/216 × 360)° = 60° |
Supervisor | 27 | (27/216 × 360)° = 45° |
Clerk | 18 | (18/216 × 360)° = 30° |
EXAMPLE:
Thus, we obtain the required pie chart, as shown in the given figure.
The table shows the frequency distribution of grades obtained by 120 students. The data is represented in the following pie chart. Which sector is in correctly labelled ?
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| Right Option : D | |||||||||||||
| View Explanation | |||||||||||||
The pie chart shows four different modes of transport to school for a group of students. Calculate the percentage of students who go to school by bus.
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| Right Option : C | |||
| View Explanation | |||
The table shows the number of three differenct brands of laptops sold by a certain store. The data are respresented by the pie chart which shows a semicircle divided into six equal sectors. The angle of sector representing the number of Bell laptops sold is :
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| Right Option : B | |||||||||||
| View Explanation | |||||||||||
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