Neco 2024 Civic Education Question 19
Practice objective / multiple choice question 19 from the 2024 Neco Civic Education examination.
A study of 1,000 youths finds that \(40\%\) have used drugs. Among drug users, \(35\%\) have a family history of substance abuse; among non‑users, \(10\%\) have such a history. Overall, \(20\%\) of the youths have a family history.\n(a) Given that a youth has a family history, what is the probability that they are a drug user?\n(b) A prevention programme reduces the probability of drug use among youths with a family history by \(25\%\) (relative reduction). Assuming the probability for youths without a family history remains unchanged, what is the new overall proportion of drug users in the population? Express your answer as a percentage to one decimal place.
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About This Question
This is Neco 2024 Civic Education Question 19. It is one of the objective questions from the 2024 Neco Civic Education examination.
Difficulty level: Hard .
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