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Calculating probability for Battery charge lenght

Suppose we know the length of time a battery will hold a charge is a normal distribution with a mean of 50 hours and a standard deviation of 15 hours. What is the probability that this measurement is between 50 and 70 hours?

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In this problem mean ยต=50 hours and standard deviation = 15 hours.
X is the random variable with which are concerned.

Given that it ...

Solution Summary

Solution explains to calculate probabilty for battery charge lenght. Given that battery charge lenght follows nornal distribution.