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Q.5 (ii) The following pie-diagram shows percentage of persons according to blood group in a blood group checking camp. Answer the following questions :[Pie diagram: O – 45%, B – 30%, A – 20%, AB – 5%](a) Find the measure of central angle for each bl…

Q.5 (ii) The following pie-diagram shows percentage of persons according to blood group in a blood group checking camp. Answer the following questions :

[Pie diagram: O – 45%, B – 30%, A – 20%, AB – 5%]

(a) Find the measure of central angle for each blood group.
(b) Find the total number of persons, if there are 600 persons of blood group B.

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Answer: (a) O = 162°, B = 108°, A = 72°, AB = 18°; (b) 2000 persons

(a) Central angle = \(\dfrac{\text{percentage}}{100} \times 360^\circ\):

O: \(\tfrac{45}{100} \times 360 = 162^\circ\); B: \(\tfrac{30}{100} \times 360 = 108^\circ\); A: \(\tfrac{20}{100} \times 360 = 72^\circ\); AB: \(\tfrac{5}{100} \times 360 = 18^\circ\). (Total 360°.)

(b) 30% of total = 600, so total = \(600 \times \dfrac{100}{30} = 2000\) persons.

Doubtly AI · 24 Oct 2026 AI-verified · Oct 2026 Report
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