SOLUTION: A quality control inspector found 6 defective video cassettes in a shipment of 4000 cassettes. At this rate, how many cassettes would be expected to be defective in a shipment of 1

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Question 628466: A quality control inspector found 6 defective video cassettes in a shipment of 4000 cassettes. At this rate, how many cassettes would be expected to be defective in a shipment of 10,000 cassettes?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Mean:

mu = np

mu = 10000*(6/4000)

mu = 15

So there are 15 defective cassettes expected in the shipment.