In a shipment of 120 machine parts, 5 percent were defective. In a shipment of 80 machine parts, 10 percent were defective. For the two shipments combined, what percent of the machine parts were defective?	Choose the correct choice from the following
A) 6.5%	B) 7.0%	C) 7.5%	D) 8.0%	E) 8.5%
5% of 120 is 6   10% of 80 is 8   As the question says two shipments combined, we have to add the defective as well as total shipments.   8+6/120+80 = 15/200 = 7.5%   Answer 7.5%
<result>C</result>
In a shipment of 120 machine parts, 5 percent were defective. In a shipment of 80 machine parts, 10 percent were defective. For the two shipments combined, what percent of the machine parts were defective?