Question: The light bulbs produced by Edison Lighting Corporation last an average of 300 h. The life of the light bulbs is believed to follow a

The light bulbs produced by Edison Lighting Corporation last an average of 300 h. The life of the light bulbs is believed to follow a normal distribution with a standard deviation of 10. A customer buys 2 dozen light bulbs during a sale.

What is the probability that 1 light bulb used will last longer than 315 h?

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Question: The light bulbs produced by Edison Lighting Corporation last an average of 300 h. The life of the light bulbs is believed to follow a

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