Due to turnover and absenteeism at an assembly plant, 20% of the items are assembled by inexperienced employees. Management has determined that customers return 12% of the items assembled by inexperienced employees, whereas only 3% of the items assembled by experienced employees are returned. a). Can a probability tree diagram be drawn for the above described situation? If yes, draw the tree diagram and place the appropriate probabilities on it. Describe and define all related events.
b). If an item has been returned, what is the probability that it was assembled by an inexperienced employee?