This is normal distributions and i dont know anything about how to do this or where to even start so any help would help me Thanks \frac{\mathrm{d} }{\mathrm{d} }

The time required to finish a test in normally distributed with a mean of 40 minutes and a standard deviation of 8 minutes. What is the probability that a student chosen at random will finish the test in more than 48 minutes?

A.84%

B.2%

C.34%

D.16%

2.

Suppose you have a normally distributed set of data pertaining to a standardized test. The mean score is 1000 and the standard deviation is 200. What is the z-score of 1600 point score?

A.2.5

B.3.0

C.1.5

D.0.5