A final exam in Math 160 has a mean of 73 with a standard deviation 7.8. If 24 students are randomly selected, find the probability that the mean of their test scores is less than 70.

A final exam in Math 160 has a mean of 73 with a standard deviation 7.

1.	A final exam in Math 160 has a mean of 73 with a standard deviation 7.8. If 24 students are randomly selected, find the probability that the mean of their test scores is less than 70.
Answer» A final exam in Math 160 has a mean of 73 with a standard deviation 7.8. If 24 students are randomly selected, find the probability that the mean of their test scores is less than 70. Solution: