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# 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.

Suppose 2% of cotton fabric rolls and 3% of nylonfabric rolls contain flaws. Of the rolls used by a manufacturer,70% are cotton and 30% are nylon. What is the probability that arandomly selected roll used by the manufacturer contains flaws?