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In a survey of a group of men, the heights in the 20-29 age group were normally distributed, with a mean of 67.8 inches and

In a survey of a group of men, the heights in the 20-29 age group were normally distributed, with a mean of 67.8 inches and a standard deviation of 2.0 inches. A study participant is randomly selected. Find the probability that a study participant has a height that is less than 68 inches. Please provide detail answers.

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