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Posted on Jul 06, 2024

A lamp type has an output that is known to be normally distributed with a mean of 2500 W and standard deviation of 75 W.

a. What percentage of lamps has an output of more than 2450 W?

b. What percent of the lamps have an output between 2400 W to 2600 W?

c. How many lamps have an output of less than 2650 W, if there are 1000 lamps of this type?

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