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4. 0.5% of the plastic ducks produced are found to be defective. What is the probability that in a random sample of 500 articles there

4. 0.5% of the plastic ducks produced are found to be defective. What is the probability that in a random sample of 500 articles there will be A. three defective ducks B. fewer than six defective ducks C. four or more defective ducks

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