The age group and number of persons, who donated blood in a blood donation camp is given below. Draw a pie diagram from it.
| Age group (Yrs) | 20–25 | 25–30 | 30–35 | 35–40 |
|---|---|---|---|---|
| No. of persons | 80 | 60 | 35 | 25 |
Answer: Central angles – 20–25: 144°, 25–30: 108°, 30–35: 63°, 35–40: 45°
| Component | Value | Measure of central angle |
|---|---|---|
| 20–25 | 80 | \(\frac{80}{200} \times 360^\circ = 144^\circ\) |
| 25–30 | 60 | \(\frac{60}{200} \times 360^\circ = 108^\circ\) |
| 30–35 | 35 | \(\frac{35}{200} \times 360^\circ = 63^\circ\) |
| 35–40 | 25 | \(\frac{25}{200} \times 360^\circ = 45^\circ\) |
| Total | 200 | \(360^\circ\) |
Draw a circle of any convenient radius and one radius in it. Using a protractor, draw sectors with the above central angles one after the other, and write the name of each component in its sector.
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