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Question: a carton of 18 rechargeable batteries contains three that are...

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A carton of 18 rechargeable batteries contains three that are defective.  What is the probability of an inspector choosing 4 of the batteries and get exactly one defective battery? Give your answer to three decimal places.

A carton of 18 rechargeable batteries contains three that are defective. In how many ways can an inspector choose 4 of the batteries and get exactly two defective batteries? Give your answer to three decimal places.

A carton of 18 rechargeable batteries contains one that is defective. In how many ways can an inspector choose 4 of the batteries and get the defective battery? Give your answer to three decimal places.

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