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Question: Three machines-A, B, and C-are used to produce a large quantity of identical parts at a factory. Machine A produces 60% of the parts, while Machines B and C produce 30% and 10% of the parts, respectively. Historical records indicate that 10% of the parts produced by Machine A are defective, compared with 30% for Machine B and 40% for Machine C.
(a) Draw a tree diagram to represent this chance process.
(b) If we choose a part produced by one of these three machines, what's the probability that it's defective? Show your work.
(c) If a part is inspected and found to be defective, which machine is most likely to have produced it? Give appropriate evidence to support your answer.
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