The lifetime of traditional light bulbs measured

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The lifetime of traditional light bulbs measured in hours is known to be normally distributed with μ=100 and σ=20. What is the probability that a randomly selected traditional light bulb will have a lifetime of 85 hours or longer?

Reference no: EM131098392

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The lifetime of traditional light bulbs measured : The lifetime of traditional light bulbs measured in hours is known to be normally distributed with μ=100 and σ=20. What is the probability that a randomly selected traditional light bulb will have a lifetime of 85 hours or longer?

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