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A survey among freshmen at a large university showed that the number of hours spent studying...

A survey among freshmen at a large university showed that the number of hours spent studying the week before final exams was normally distributed with a mean of 25 hours and standard deviation of 7 hours. What is the probability a randomly selected freshman spends between 35 and 43 hours studying the week before final exams?

a.

0.0713
b.

0.0565
c.

0.1271
d.

0.8729
Math   Statistics-And-Probability   
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