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Question
Draw a pie diagram to represent the world population given in the following table:
| country | Japan | England | India | China |
| Percentage of world population | 20 | 10 | 40 | 30 |
Sum
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Solution
The percentages of population are converted into component parts of 360° in the following table:
| Country | Percentage of world population | Measure of the central angle |
| Japan | 20 | `20/100 xx 360^circ` = 72° |
| England | 10 | `10/100 xx 360^circ` = 36° |
| India | 40 | `40/100 xx 360^circ` = 144° |
| China | 30 | `30/100 xx 360^circ` = 108° |
| Total | 100 | 360° |
On the basis of the table, the pie diagram is drawn:
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