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The Ten Finger calculator company periodically checks random calculators before shipping crates out to customers. On Wednesday, 12 calculators from each of 6 crates of 12 calculators were tested. Two of the tested calculators were found to be defective. Based on this rate of defect, how many total calculators are expected to be defective?

 Jul 10, 2022
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expected number of defectives = probability of getting a defective * total number of calculators 


total calculators = 6 * 12 = 72

 

P(defect) = 2/12 = 1/6

 

expected defectives = 1/6 * 72 = 12

 Jul 11, 2022

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