Mary050 Mary050

03-01-2017
Mathematics

contestada

Suppose a brand of lightbulbs is normally distributed with a mean life of 1900 hours and a standard deviation of 50 hours. Find the probability that a lightbulb will last between 1825 hours and 1980 hours

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Аноним Аноним

03-01-2017

I am not sure exactly how to do it but based on my knowledge, I think the answer would be 1/38

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