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Company XYZ know that replacement times for the DVD players it produces are normally distributed with a mean of 6.1 years and a standard deviation

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Company XYZ know that replacement times for the DVD players it produces are normally distributed with a mean of 6.1 years and a standard deviation of 2.5 years. Find the probability that a randomly selected DVD player will have a replacement time less than -1.7 years? P(X

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