Question: When a machine is improperly adjusted, it has probability 0.15 of producing a defective item. Each day the machine is run until three defective items

When a machine is improperly adjusted, it has probability 0.15 of producing a defective item. Each day the machine is run until three defective items are produced. If this occurs, it is stopped and checked for adjustment. What is the probability that an improperly adjusted machine will produce five or more items before being stopped? What is the average number of items an improperly adjusted machine will produce before being stopped?

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