Problem 3 Before burning out, a light bulb gives X hours of light, where X is...

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Problem 3 Before burning out, a light bulb gives X hours of light, where X is N(500,400). If you have three lightbulbs, what is the probability that they will give a total of at least 1450 hours of light.

math Statistics-And-Probability

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Problem 3 Before burning out, a light bulb gives X hours of light, where X is...

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