Question

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Answer 1

Hey friend here is ur ans :

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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