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

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Solution

The measures of central angles are given in the table.

Age group(Yrs) No. of persons Central Angle

20 - 25 80 $\frac{80}{200} \times 360 = 144 °$

25 - 30 60 $\frac{60}{200} \times 360 = 108 °$

30 - 35 35 $\frac{35}{200} \times 360 = 63 °$

35 - 40 25 $\frac{25}{200} \times 360 = 45 °$

Total 200

The pie digram showing the above data is given below:

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Age group(years)	$20 - 25$	$25 - 30$	$30 - 35$	$35 - 40$
No. of persons	$60$	$80$	$35$	$25$

Age	20−25	25−30	30−35	35−40	40−45	45−50	50−55	55−60
No. Persons	50	70	100	180	150	120	70	60

Age Group	20−25	25−30	30−35	35−40	40−45	45−50
% of Regular Players	40	35	28	20	15	5

Age of the donor (Yrs.)	20 - 24	25 - 29	30 - 34	35 - 39	40 - 44	45 - 49
No. of blood doners	38	46	35	24	15	12

Age (years)	15−19	20−24	25−29	30−34	35−39	40−44
No. of Persons	4	20	38	24	10	4

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Age group(Yrs)	20 - 25	25 - 30	30 - 35	35 -40
No. of persons	80	60	35	25