Question

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 1

The measures of central angles are given  in the table.

Age group (Yrs)	No. of persons	Central Angle
20 - 25	80	\[\frac{80}{200} \times 360 = 144^\circ\]
25 - 30	60	\[\frac{60}{200} \times 360 = 108^\circ\]
30 - 35	35	\[\frac{35}{200} \times 360 = 63^\circ\]
35 - 40	25	\[\frac{25}{200} \times 360 = 45^\circ\]
Total	200

The pie diagram showing the above data is given below: