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According to one study among a certain group, pregnancy lengths are approximately normally distributed with a...

According to one study among a certain group, pregnancy lengths are approximately normally distributed with a mean of 267 days and a standard deviation of 7 days. Approximately 12.7% of babies are premature, which means that they are born before 37 weeks in the pregnancy. A random sample of 75 pregnant women from this group is observed and the length of each pregnancy is recorded. Let X be the number of premature babies born to these mothers. What is the probability that more than 10 premature babies are born to these mothers? (do not round the answer)

Math   Statistics-And-Probability   
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