Neco 2020 Further Mathematics Question 15
Practice objective / multiple choice question 15 from the 2020 Neco Further Mathematics examination.
In a workshop, three machines A, B and C produce bolts. Machine A produces 50% of the bolts, B 30% and C 20%. Their respective defect rates are 1%, 3% and 4%. Bolts are painted red or blue: A paints 80% red, 20% blue; B paints 50% red, 50% blue; C paints 30% red, 70% blue. A bolt is selected at random and is found to be non‑defective and red. What is the probability that it was produced by machine A? Give your answer correct to three decimal places.
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About This Question
This is Neco 2020 Further Mathematics Question 15. It is one of the objective questions from the 2020 Neco Further Mathematics examination.
Difficulty level: Hard .
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