waecmaths question:
The pie chart shows the distribution of 600 mathematics textbooks for Arts, Business, Science and Technical classes.
How many textbooks are for the Technical classes?
Option A:
100
Option B:
150
Option C:
200
Option D:
250
waecmaths solution:
$\begin{align} & \text{The sectorial angle representing technical class}={{360}^{\circ }}-({{90}^{\circ }}+{{75}^{\circ }}+{{45}^{\circ }})={{150}^{\circ }} \\ & \text{No of textbooks}=\frac{{{150}^{\circ }}}{{{360}^{\circ }}}\times 600=250 \\\end{align}$
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