WAEC Further Mathematics 2022 Objective — Question 32
Question 32 of 40 from the West African Examinations Council (WAEC) Further Mathematics 2022 Objective paper, with the correct answer and a full explanation.
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The probability that a student will graduate from a college is 0.4. If 3 students are selected from the college, what is the probability that at least one student will graduate?
- A. 0.06
- B. 0.22
- C. 0.78Correct
- D. 0.80
Explanation
P(at least one graduates) = 1−P(none graduate) = 1−(0.6)³ = 1−0.216 = 0.784 ≈ 0.78.
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