It is estimated that times to completion for major league baseball games follow a normal distribution with

Question:

It is estimated that times to completion for major league baseball games follow a normal with a mean of 132 minutes and a standard deviation of 12 minutes.
a. What proportion of all games last between 120 minutes and 150 minutes?
b. Thirty-three percent of all games last longer than how many minutes?
c. What proportion of games last fewer than 120 minutes?
d. If 100 games are chosen at random, what is the probability that at least 25 of these games last fewer than 120 minutes? Distribution
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