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22-03-2018
Business

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Three defective electric toothbrushes were accidentally shipped to a drugstore by cleanbrush products along with 17 nondefective ones.
a. what is the probability the first two electric toothbrushes sold will be returned to the drugstore because they are defective

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zeruchasj20 zeruchasj20

22-03-2018

A) P( 1st two def) 3/20 times 2/19
B) P(1st two good) 17/20 times 16/19

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