Neco 2023 Civic Education Question 31
Practice objective / multiple choice question 31 from the 2023 Neco Civic Education examination.
In a secondary school, a confidential survey of 2,400 students found that 14% reported ever using cannabis, 9% reported ever using inhalants, and 3% reported having used both substances. (a) What is the probability that a student who has used either cannabis or inhalants has used both? (b) The national average proportion of students who have used both substances is 2.5%. Determine whether this school's proportion of dual‑substance users is higher than the national average by comparing the probabilities (no statistical test required). State the conclusion.
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About This Question
This is Neco 2023 Civic Education Question 31. It is one of the objective questions from the 2023 Neco Civic Education examination.
Difficulty level: Hard .
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