The number of books borrowed from a library each week follows a normal distribution. When a sample is taken for several weeks, the mean is found to be 190 and the standard deviation is 30.
What is the percentage of the chance that more than 250 books were borrowed in a week?
A. 99.7
B.95
C. 13.5
D. 2.5

Question

The number of books borrowed from a library each week follows a normal distribution. When a sample is taken for several weeks, the mean is found to be 190 and the standard deviation is 30.
What is the percentage of the chance that more than 250 books were borrowed in a week?
A. 99.7
B.95
C. 13.5
D. 2.5

anonymous · Answer

i got D. can someone verify my answer