a. If an ELT is randomly selected from the general population of all ELTS, find the probability that it was made by the Altigauge Manufacturing Company. b. If a randomly selected ELT is then tested and is found to be defective, find the probability that it was made by the Altigauge Manufacturing Company.

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An aircraft emergency locator transmitter (ELT) is a device designed to transmit a
signal in the case of a crash. The Altigauge Manufacturing Company makes 80% of
the ELTS, the Bryant Company makes 15% of them, and the Chartair Company makes
the other 5%. The ELTS made by Altigauge have a 4% rate of defects, the Bryant ELTS
have a 6% rate of defects, and the Chartair ELTS have a 9% rate of defects (which
helps to explain why Chartair has the lowest market share).
a. If an ELT is randomly selected from the general population of all ELTS, find the
probability that it was made by the Altigauge Manufacturing Company.
b. If a randomly selected ELT is then tested and is found to be defective, find the
probability that it was made by the Altigauge Manufacturing Company.
c. What is the probablity that a randomly selected ELT is defective?
Transcribed Image Text:An aircraft emergency locator transmitter (ELT) is a device designed to transmit a signal in the case of a crash. The Altigauge Manufacturing Company makes 80% of the ELTS, the Bryant Company makes 15% of them, and the Chartair Company makes the other 5%. The ELTS made by Altigauge have a 4% rate of defects, the Bryant ELTS have a 6% rate of defects, and the Chartair ELTS have a 9% rate of defects (which helps to explain why Chartair has the lowest market share). a. If an ELT is randomly selected from the general population of all ELTS, find the probability that it was made by the Altigauge Manufacturing Company. b. If a randomly selected ELT is then tested and is found to be defective, find the probability that it was made by the Altigauge Manufacturing Company. c. What is the probablity that a randomly selected ELT is defective?
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