A random variable is normally distributed with a mean of 50 and a standard deviation of 10. If an observation is randomly selected from the distribution, what value will be exceeded 45% of the time? Group of answer choices

A.54.50

B.51.26

C.48.74

D.45.5

For the normal distribution with parameters = 3, = 2 ; calculate P(2 < x < 7). Group of answer choices

A. 0.9772

B. 0.6687

C. 0.8123

D. 0.3085