What is the probability that a bolt selected at random

Reference no: EM13181880

A factory has two machines that produce bolts. Machine I produces 69% of the daily output of bolts, and 8% of its bolts are defective. Machine II produces 31% of the daily output, and 5% 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?

Reference no: EM13181880

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