Question: A certain type of storage battery lasts, on average, 3.0 years with a standard deviation of 0.5 year. Assuming that battery life is normally distributed,

A certain type of storage battery lasts, on average, 3.0 years with a standard deviation of

0.5 year. Assuming that battery life is normally distributed, find the probability that a given

battery will last less than 2.3 years. Find the probability that a given battery will last between

1 year and 2.5 years.

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