The average life expectancy of computers produced by Ahmadi, Inc. is 6 years with a standard deviation of 10 months. Assume that the lives of computers are normally distributed. Suggestion: For this problem, convert ALL of the units to months.
a. What is the probability that a randomly selected computer will have a life expectancy of at least 7 years?
b. Computers that fail in less than 5 1/2 years will be replaced free of charge. What percentage
of computers are expected to be replaced free of charge?
c. What are the minimum and the maximum life expectancy of the middle 95% of the computers'
lives? Give your answers in months and do not round your answers.
d. The company is expecting that only 104 of this year's production will fail in less than 3 years and 8 months. How many computers were produced this year?

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The Answer of The average life expectancy of computers produced by Ahmadi, Inc. is 6 years with a standard deviation of 10 months. Assume that the lives of computers are normally distributed. Suggestion: For this problem, convert ALL of the units to months.
a. What is the probability that a randomly selected computer will have a life expectancy of at least 7 years?
b. Computers that fail in less than 5 1/2 years will be replaced free of charge. What percentage
of computers are expected to be replaced free of charge?
c. What are the minimum and the maximum life expectancy of the middle 95% of the computers'
lives? Give your answers in months and do not round your answers.
d. The company is expecting that only 104 of this year's production will fail in less than 3 years and 8 months. How many computers were produced this year?

The Average Life Expectancy of Computers Produced by Ahmadi, Inc