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3 years ago

8

The average life of a lightbulb is 2500 h, with a standard deviation of 200 h. Suppose that 10,000 bulbs are purchased to equip

a new building. Assume that the lives are normally distributed. How many of the light bulbs would be expected to burn out after just 1800 h?

1 answer:

Anna35 [415]3 years ago

4 0

0 lightbulbs would be expected to burn out in 1800 hours

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