Question: A class' test grades are normally distributed with a mean of 70 and standard deviation of 10. a.) If an individual enrolled in this class,

A class' test grades are normally distributed with a mean of 70 and standard deviation of 10.

a.) If an individual enrolled in this class, what is the probability that they earn an A (90% or above)?

b.) 8 students study together before the exam. What is the probability that their group average is higher than 85%?

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