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Eyeglassomatic manufactures eyeglasses for different retailers. In March 2010, they tested to see how many defective lenses they made, and there were 16.9% defective lenses

Eyeglassomatic manufactures eyeglasses for different retailers. In March 2010, they tested to see how many defective lenses they made, and there were 16.9% defective lenses due to scratches. Suppose Eyeglassomatic examined 20 eyeglasses.

A. State the random variable

B. Argue that this is a binomial experiment

C. Find the probability that none are scratched

D. Find the probability that at least 3 are scratched.

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