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4 March, 14:31

The lifespan of a 60-watt lightbulb produced by a company is normally distributed with a mean of 1450 hours and a standard deviation of 8.5 hours. if a 60-watt light bulb produced by this company is selected at random, what is the probability that its lifespan will be less than 1465 hours

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  1. 4 March, 15:23
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    To find probability of something random you can take three random things and times them by each other.

    You haven't given enough information for me to answer this completely.

    But I would assume the answer is 100% or 99%.
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