WAEC Mathematics 2023 Paper

Concept:Probability compares the number of favourable outcomes to the total number of possible outcomes.Explanation:Add all the frequencies from the bar chart to find the total number of students.Total students $= 3 + 6 + 9 + 1 + 12 + 7 + 5 + 10 = 53$The failed mark was $4$, so any student who scored above $4$ passed.Thus, the students who passed are those with marks $5, 6, 7,$ and $8$.Number of students who passed $= 12 + 7 + 5 + 10 = 34$So, probability that a randomly selected student passed is:$P(\text{passed}) = \frac{34}{53} = 0.6415$This is approximately $0.64$.Answer:D. $0.64$