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Mathematics, 08.07.2019 13:00 robert7248

The life expectancy of a typical lightbulb is normally distributed with a mean of 2,000 hours and a standard deviation of 27 hours. what is the probability that a lightbulb will last between 1,975 and 2,050 hours? a. 0.17619 b. 0.32381 c. 0.79165 d. 0.96784

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