Mathematics WAEC

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

Ages in years 7 8 9 10 11
No. of Pupils 4 13 30 44 9

A. 48.6°
B. 56.3°
C. 46.8°
D. 13°

Correct Answer: Option C

C. 46.8°

Explanation

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

The number of 8 – year olds = 13

The angle represented by the 8-year olds on the pie chart = 13/100 × 360°
= 46.8°

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