Question 4

Jambmaths question: 

Age in years

7

8

9

10

11

No of pupils

4

13

30

44

9

The table above shows the number of pupils in a class with respect to their ages. If a pie chart is constructed to represent the age, the angle corresponding to 8 years old is

Option A: 

48.6°

Option B: 

56.3°

Option C: 

46.8°

Option D: 

13°

Jamb Maths Solution: 

Total number of pupils = 4 + 13 + 30 + 44 + 9 =100

That is 100 is equivalent to 360o

The angle of sector for those whose ages are 8 is $\frac{13}{100}\times 360{}^\circ =46.8{}^\circ $

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