Solved: A shipment of 12 microwave ovens contains three defective units. A vending
Chapter 9, Problem 47(choose chapter or problem)
A shipment of 12 microwave ovens contains three defective units. A vending company has ordered four units, and because each has identical packaging, the selection will be random. What is the probability that (a) all four units are good, (b) exactly two units are good, and (c) at least two units are good?
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