katwest2015 katwest2015

11-11-2020
Mathematics

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A sample of 4 different calculators is randomly selected (without replacement) from a group containing 47 that are defective and 30 that have no defects. What is the probability that all four of the calculators selected are defective?

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11-11-2020

Answer:

0.1318 or 13.18%

Step-by-step explanation:

47/77 * 46/76 * 45/75 * 44/74

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