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1. 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?
- A. 6.5%
- B. 6.5%
- C. 6.5%
- D. 6.5%
Answer: Option B
Explanation:
Defective parts in the shipment of 120
= 5% of 120 = (5/100) ×120 = 6
Defective part in the shipment of 80 = 10% of 80
= (10/100) ×80 = 8
∴ Total machine parts = 120 + 80 = 200
Total defective parts = 6 + 8 = 14
% of defective parts = {(14/200)×100}% = 7%
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