The life spans of car batteries are normally distributed

The life spans of car batteries are normally distributed, with a mean of 44 months and a standard diviation of 5 months.

A) A car battery is selected at random. Find the probability that the life span of the battery is less than 36 months.

B) A car battery is selected at random. Find the probability that the life span of the battery is between 42 and 60 months.

C) What is the shortest life expectancy a car battery can have and still be in the top 5% of life expectancies?

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The life spans of car batteries are normally distributed : the life spans of car batteries are normally distributed with a mean of 44 months and a standard diviation of 5

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