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answer all the questions 4. Four light bulbs are selected at random without replacement from 16 bulbs, of which 7 are defective. Find the probability

answer all the questions

4. Four light bulbs are selected at random without replacement from 16 bulbs, of which 7 are defective. Find the probability that a) none are defective. b) exactly one is defective. c) at least one is defective

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