three defective electric tooth brushes were


Three defective electric tooth brushes were shipped to a drug store by Clean Brush Products along with 17 non defective ones.

A) What is the probability the first two electric toothbrushes sold will be returned because they are defective?

B) What is the probability the first 2 brushes sold will not be defective?

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Macroeconomics: three defective electric tooth brushes were
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