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The lengths of human pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. What is the probability

The lengths of human pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. What is the probability that a pregnancy lasts at least 300 days?

a. 0.0179

b. 0.9834

c. 0.9901

d. 0.0166

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