waecmaths question:
Given the set A ={2, 4, 6, 8} and B = {2, 3, 5, 9}.
If a number is selected at random from set B. what is the probability that the number is prime
Option A:
1
Option B:
¾
Option C:
½
Option D:
¼
waecmaths solution:
$\begin{align} & \text{Prime numbers in set B are 2, 3 } \\ & \Pr (selecting\text{ }a\text{ }prime\text{ }number\text{ }from\text{ }set\text{ }B)=\frac{2}{4}=\frac{1}{2} \\\end{align}$
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