I need to know how to use the formula to answer these questions.
The time needed to drive from town A to town B is normally distributed with a mean of 180 minutes and standard deviation of 20 minutes. What is the probability that a person will drive from town A to town B in i) three hours or more, ii) in less than 180 minutes, iii) in more than 140 minutes, iv) in exactly three hours, and v) in less than 2.5 hours?© BrainMass Inc. brainmass.com June 4, 2020, 3:29 am ad1c9bdddf
i) Since 3 hours = 180 minutes, the answer is P(X>180)=P(Z>(180-180)/20)=P(Z>0)=0.5 by using a standard ...
This solution shows how to use a formula to solve a series of problems.