SOLUTION: if 20% of bulbs manufactured by a company are defective what is the average of defective bulbs in batch of 400 bulbs??

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Question 1191993: if 20% of bulbs manufactured by a company are defective what is the average of defective bulbs in batch of 400 bulbs??
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
The expected value of defective balls is np=400(0.2)=80