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The admission test scores for a college follow a normal distribution. Admission test score has a mean of 50 and a standard deviation of 5.8.

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The admission test scores for a college follow a normal distribution. Admission test score has a mean of 50 and a standard deviation of 5.8. If a sample of 40 students is selected at random, what is the probability that the mean exam score of this group is greater than 50.5? Express your answer as a percentage. Use two decimals and a period

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