# Q Research

posted by
**Maurice** on
.

2. The average commute time via train from the Chicago O'Hare Airport to downtown is 60 minutes with a standard deviation of 15 minutes. Assume that the commute times are normally distributed. What proportion of commutes would be:

a. longer than 80 minutes?

b. less than 50 minutes?

c. between 45 and 75 minutes?