Question 34

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Jambmaths question: 

The grade of 36 students in a test shown in the pie chart . How many students had excellent?

Option A: 

12

Option B: 

7

Option C: 

8

Option D: 

9

Jamb Maths Solution: 

$\begin{align}  & \text{The sector angle of those who had excellent} \\ & {{360}^{o}}-({{90}^{o}}+{{80}^{o}}+{{120}^{o}})={{70}^{o}} \\ & {{70}^{o}}\text{ in the sector will be }\frac{{{70}^{o}}}{{{360}^{o}}}\times 36=7 \\ & \text{7 students had excellent} \\\end{align}$

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