2) A sample of 4 different calculators is randomly selected from a group containing 18 that are defective and 40 that have no defects. What is the probability that at least one of the calculators is defective? A) 0.785 B) 0.180 C) 0.215 D) 0.774
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There are 18 defective calculators and 40 non-defective calculators. Total calculators = 18 + 40 = 58. Show more…
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