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q3. In your company, there is a manufacturing process that produces a part that inspectors grade...

q3. In your company, there is a manufacturing process that produces a part that inspectors grade as as either 1) Excellent, 2) Fair, or 3) Poor. The probabilities that a part is graded as excellent, fair, and poor are 1/8, 3/8, and 1/2; respectively. A new inspector, Steve, has just started working for your company. After performing three inspections, what is the probability that Steve grades an excellent part before a poor part?

Math   Statistics-And-Probability   
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