Each pie chart has 360°, since it is represented by a complete circle.
a.) central angle for blood group O = 45 / 100 × 360 = 162 °
central angle for blood group AB = 5/100 × 360 = 18 °
central angle for blood group B = 30/ 100 × 360 = 108 °
central angle for blood group A = 20/100 × 360 = 72°
b.) since there are 600 persons in group B there fore , no. of persons in group B = percent / 100 × total no. of persons 600 = 30/100 × total no. of persons (600×100)/ 30 = total no. of persons
total no. of persons = 2000 ..
no. of persons in blood group O = 45/100 × 2000 ( hence according to formula ) = 900 persons
no.of persons in blood group AB = 5/100 × 2000 = 100 persons
no.of persons in blood group A = 20/100 × 2000 = 400 persons
Answers & Comments
Each pie chart has 360°, since it is represented by a complete circle.
a.) central angle for blood group O = 45 / 100 × 360
= 162 °
central angle for blood group AB = 5/100 × 360
= 18 °
central angle for blood group B = 30/ 100 × 360
= 108 °
central angle for blood group A = 20/100 × 360
= 72°
b.) since there are 600 persons in group B
there fore ,
no. of persons in group B = percent / 100 × total no. of persons
600 = 30/100 × total no. of persons
(600×100)/ 30 = total no. of persons
total no. of persons = 2000 ..
no. of persons in blood group O = 45/100 × 2000 ( hence according to formula )
= 900 persons
no.of persons in blood group AB = 5/100 × 2000
= 100 persons
no.of persons in blood group A = 20/100 × 2000
= 400 persons
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