Question 43

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waecmaths question: 

If a student is picked at random from the four Departments, what is the probability that he is not from the Education Department

Option A: 

$\tfrac{3}{10}$

Option B: 

$\tfrac{2}{9}$

Option C: 

$\tfrac{5}{18}$

Option D: 

$\tfrac{7}{10}$

waecmaths solution: 

$\begin{align}  & \Pr (E)=\frac{{{108}^{\circ }}}{{{360}^{\circ }}}=\frac{3}{10} \\ & \Pr (E)'=1-\frac{3}{10}=\frac{7}{10} \\\end{align}$

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