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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