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Three Defective Electric Toothbrushes Were Accidentally Shipped to a Drugstore

Question 63

Multiple Choice

Three defective electric toothbrushes were accidentally shipped to a drugstore by the manufacturer
Along with 17 non-defective ones. What is the probability that the first two electric toothbrushes sold
Will be returned to the drugstore because they are defective?


A) 3/20 or 0.15
B) 3/17 or 0.176
C) 1/4 or 0.25
D) 3/190 or 0.01579

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