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 pie chart shows the number of perticipants from four countries P, Q, R and S taking part in a tennis tournament. Given that there are 18 participants from country S, find the number of participants from country P.
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| Right Option : B | |||
| 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 on foot.
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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 car.
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| Right Option : A | |||
| View Explanation | |||
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