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Company XYZ know that replacement times for the quartz time pieces it produces are normally distributed with a mean of 17 years and a standard
Company XYZ know that replacement times for the quartz time pieces it produces are normally distributed with a mean of 17 years and a standard deviation of 1.4 years.
Find the probability that a randomly selected quartz time piece will have a replacement time less than 13.6 years?
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