(Answered) Cd players are normally distributed with a mean of 71 years

Economics

CD players are normally distributed with a mean of 7.1 years and a standard deviation of 1.4 years

a) Find the probability that a randomly selected CD player will have a replacement time of less than 8.0 years.

b) Find the probability that a randomly selected CD player will have a replacement time of more than 9.0 years.

c) Find the probability that a randomly selected CD player will have a replacement time between 5 and 8 years.

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