What is the probability that electrocardiograph is produced

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Suppose Company A manufactures 75% of all EKG machines, Company B produces 20% of these machines, and Company C produces 5%. The company A has a fault rate of 4%, company B has a fault rate of 5%, while that company C has a default rate of 8%.

a) A randomly selected electrocardiograph is tested and found to be defective. Find it probability that it was made by company A.

b) What is the probability that an electrocardiograph is produced by Company A and that it is not flawed.

Reference no: EM132852499

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