The length in days of human pregnancies is known to be normally distributed with a mean of 266 days and a standard deviation of 16 days, a random sample of 50 pregnant women were selected from the population, what is the minimum number of days that belongs to the longest 5% of all pregnancies last? (A) 269.72 days B) 239.68 days C) 292.32 days D 262.28 days

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