waecmaths question:
The ratio of boys to girls in a class is 5:3, find the probability of selecting at random a girl from the class
Option A:
$\tfrac{1}{8}$
Option B:
$\tfrac{1}{3}$
Option C:
$\tfrac{3}{8}$
Option D:
$\tfrac{3}{5}$
waecmaths solution:
$\begin{align} & n(G)=3 \\ & n(B)=5 \\ & \Pr (G)=\frac{3}{8} \\\end{align}$
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