Test Index

WAEC Mathematics 2023 Paper

Question : 25

Total: 50

Solution:

Concept:

Probability is the ratio of favourable outcomes to total possible outcomes.

Explanation:

Numbers from 40 to 50 inclusive are: 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50.

So, total possible outcomes = 11.

Prime numbers in this range are 41, 43, and 47.

Thus, favourable outcomes = 3.

Therefore, probability

= \frac{\text{favourable outcomes}}{\text{total outcomes}} = \frac{3}{11}

Answer:

\frac{3}{11}

(Option B).

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