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In a shipment of 120 machine parts 5% were defective . In a shipment of 80 machine part, 10% were defective . For the two shipments combined , what percent of the machine parts were defective?

In a shipment of 120 machine parts 5% were defective . In a shipment of 80 machine part, 10% were defective . For the two shipments combined , what percent of the machine parts were defective? Correct Answer 7.0%

For the two shipments combined, the percent of defective parts = (total # of defective parts)/(total # of parts)*100 = (120∗0.05 + 80∗0.1)/(120 + 80)∗100 = 7

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