...computers as factory B? Factories A and B produce computers. Factory A produces 4 times as many computers as factory B. The probability that an item produced by factory A is defective is 0.01 and the probability that an item produced by factory B is defective is 0.045.
A computer is selected at random and it is found to be defective. What is the probability it came from factory A?
A computer is selected at random and it is found to be defective. What is the probability it came from factory A?