4. Four items of which 10% are known to be defective are purchased. Let X be the v.a. which denotes the number of defective items among the four purchased. Defective items will be returned by buyer for repair and repair cost is g(X) = 3X²+X+2. What is the average cost of repair? Hint: Var X = EX2 - (EX)²

Elementary Geometry for College Students
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ISBN:9781285195698
Author:Daniel C. Alexander, Geralyn M. Koeberlein
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Chapter4: Quadrilaterals
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4. Four items of which 10% are known to be defective are purchased. Let X be the v.a. which denotes the number
of defective items among the four purchased. Defective items will be returned by buyer for repair and repair cost is
g(X) = 3X²+X+2. What is the average cost of repair? Hint: Var X = EX² – (EX)²
Transcribed Image Text:SOLVE STEP BY STEP IN DIGITAL FORMAT 4. Four items of which 10% are known to be defective are purchased. Let X be the v.a. which denotes the number of defective items among the four purchased. Defective items will be returned by buyer for repair and repair cost is g(X) = 3X²+X+2. What is the average cost of repair? Hint: Var X = EX² – (EX)²
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