caleb12322 caleb12322

19-12-2016
Mathematics

contestada

The life expectancy of a lightbulb is normally distributed with a mean of 1975 hours and a standard deviation of 25 hours what is the probability that a lightbulb last between 1 950 and 2050 hours

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brendanbeh brendanbeh

19-12-2016

(1975-1950)/25 = 25/25 = +1

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