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The lifetime of lightbulbs produced is normally distributed with mean 500 hours and standard deviation 50...

The lifetime of lightbulbs produced is normally distributed with mean 500 hours and standard deviation 50 hours. What is the probability that a randomly chosen lightbulb will last between 440 and 620 hours?

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the probability that a randomly chosen lightbulb will last between 440 and 620 hours is -

0.8767

◆ Probability Calculation-

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