Concept explainers
Manufacturing A factory has two machines that produce bolts. Machine I produces 60% of the daily output of bolts, and 3% of its bolts are defective. Machine II produces 40% of the daily output, and 2% of its bolts are defective.
a. What is the probability that a bolt selected at random will be defective?
b. If a bolt is selected at random and found to be defective, what is the probability that it was produced by machine I?
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