What is the probability that it came from supplier x

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An electronics assembly firm buys its microchips from three different suppliers; half of them are bought from firm X , whilst firms Y and Z supply 30% and 20%, respectively. The suppliers use different quality-control procedures and the percentages of defective chips are 2%, 4% and 4% for X , Y and Z , respectively. The probabilities that a defective chip will fail two or more assembly-line tests are 40%, 60% and 80%, respectively, whilst all defective chips have a 10% chance of escaping detection. An assembler finds a chip that fails only one test. What is the probability that it came from supplier X ?

Reference no: EM13887227

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