Solve the problem  27.) If the life, in months, of a certain type of car battery is normally distributed with a mean of 79 months and a standard deviation of 6 months, what should be the guarantee period if the company wants less than 5% of the batteries to fail while under warranty A) Less than 63.52 months    B) Less than 21.73 months. C) Less than 69.1 months.   D) Less than 88.9 months

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27.) If the life, in months, of a certain type of car battery is normally distributed with a mean of 79 months and a standard deviation of 6 months, what should be the guarantee period if the company wants less than 5% of the batteries to fail while under warranty

A) Less than 63.52 months    B) Less than 21.73 months. C) Less than 69.1 months.   D) Less than 88.9 months

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