Mathematics, 10.12.2020 18:30 trob1902

A lightbulb manufacturer has found that the amount of time their lightbulbs work is normally distributed with a mean of 500 hours and a standard deviation
of 50 hours. In a random sample of 1,500 of lightbulbs, which of the following is
closest to the expected number of lightbulbs that would work for more than
600 hours?
0 240
O 38
O 1,462
o 2

Answers: 2

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