Factories A, B and C produce computers. Factory A produces 4 times as many compu
ID: 3129952 • Letter: F
Question
Factories A, B and C produce computers. Factory A produces 4 times as many computers as factory C, and factory B produces 5 times as many computers as factory C. The probability that a computer produced by factory A is defective is 0.028, the probability that a computer produced by factory B is defective is 0.031, and the probability that a computer produced by factory C is defective is 0.055. A computer is selected at random and it is found to be defective. What is the probability it came from factory A?
Answer is NOT .2917
Explanation / Answer
Hence prob for defective = 0.339
Prob for defective and from C = 0.057
Prob of C/defective = 0.057/0.339 = 0.168142
A B C Units 4 6 1 Def 0.024 0.031 0.057 Units*def 0.096 0.186 0.057 0.339Related Questions
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