Past experience has shown that for every 100,000 items produced in a plant by the morning shift, 200 are defective, and for every 100,000 items produced by the evening shift, 500 are defective. During a 24-hour period, 1000 items are produced by the morning shift and 600 by the evening shift. What is the probability that an item picked at random from the total of 1600 items produced during the 24-hour period. a) Was produced by the morning shift and is defective? (5 marks) b) Was produced by the evening shift and is defective? (5 marks) c) Was produced by the evening shift and is not defective? (5 marks) d) Is defective, whether produced by the morning or the evening shift?
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