[Solved] The life of a type of battery is normally distributed with µ=100 hours and σ = 20 hours. What proportion of the batteries will last between 100

Question: The life of a type of battery is normally distributed with µ=100 hours and σ = 20 hours.

What proportion of the batteries will last between 100 and 115 hours?
What proportion of the batteries will last more than 90 hours?
90% of the batteries will last more than how many hours?
What is the interquartile range of the battery life?

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[Solved] The life of a type of battery is normally distributed with µ=100 hours and σ = 20 hours. What proportion of the batteries will last between 100

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