Answer to Question #333533 in Statistics and Probability for john

Question

Currently, all of SMO operations are carried out on two separate production lines, one driven by a new PC machine and the other by a relatively older machine. Recent monitoring of each machine show that the probability of failure in the new one is 0.3 % and in the old one is 0.7%. Given that the quality assurance department insists on a probability of 99.999% that at least one machine is working at all times, advise SMO if this condition is being satisfied.