Unit 6 QPA A company is trying to reduce the cost of producing one of...
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Unit 6 QPA A company is trying to reduce the cost of producing one of its tools It comes up with a much cheaper new method of production A large box of 2 000 tools produced by both methods is examined by testers Old Method New Method Acceptable Defective 1 640 23 328 9 of a 1 One tool is selected at random What is the probability of drawing a tool that is defective or produced by the new method Explain A los 2 One tool is chosen at random from the box It is then replaced A tool is selected again What is the probability that both selected tools were acceptable Are the events dependent or independent Explain 3 What is the probability that a tool selected at random is defective given that the tool was produced by the new method
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