SOLUTION: A batch of 50 coils, but 8 of them are defective. If 4 different coils are randomly selected from this batch: What is the probability that all four are free of defects?

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Question 1114690: A batch of 50 coils, but 8 of them are defective. If 4 different coils are randomly selected from this batch: What is the probability that all four are free of defects?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
42 are not defective
(42/50)(41/49)(40/48)*(39/47)=0.4860