SOLUTION: A company has a defect rate of 0.3% on its production line. The defect average for last week was 2 items out of 400. What is the difference between the allowed defect rate and th

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Question 434132: A company has a defect rate of 0.3% on its production line. The defect average for last week was 2 items out of 400. What is the difference between the allowed defect rate and the defect average for last week.
Answer by Gogonati(855) About Me  (Show Source):
You can put this solution on YOUR website!
The defect rate 0.3% means that in every 1000 parts, tree are defective.
We find now the average defect rate for this week: 2/400=1/200=0.5/100=0.5%, and the difference between the allowed defect rate and the defect average rate for last week is:
0.5%-0.3%=0.2%, thus the defect average rate is increased by 0.2%.