Suppose 2% of cotton fabric rolls and 3% of nylon fabric rolls contain flaws. Of the rolls used by a manufacturer, 70% are cotton and 30% are nylon. What is the probability that a randomly selected roll used by the manufacturer contains no flaws? Let F denote the event that a roll contains a flaw and let C denote the event that a roll is cotton. (Show complete solution in your answer sheet) a. 0.977 O b. 0.686 c. 0.023

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