The life span of a calculatormanufactured by Texas Instruments has a normal distribution with amean of 65 months and a standard deviation of 1 year. The companyguarantees that any calculator that starts malfunctioning within 38months of the purchase will be replaced by a new one. About whatpercentage of calculators made by this company are expected to bereplaced? (Hint: Draw a picture, shade the region, label the axes.)If the company sells 5000 calculators, how many are expected to bereplaced?
