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Mathematics, 04.07.2020 23:01 daydallas01

A 60-watt light bulb advertises that it will last 1500 hours. The lifetimes of these light bulbs is approximately normally distributed with a mean of 1550 hours and a standard deviation of 57 hours. What proportion of these light bulbs will last less than the advertised time

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A 60-watt light bulb advertises that it will last 1500 hours. The lifetimes of these light bulbs is...

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