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A dump of our free Chat sessions, in case it is useful. It excludes white boards used during paid sessions.





tutor3 : Hello Student, May I help you with your Math problems?
student : According to the National Automobile Dealers Assoc., 75% of U.S. car dealers' profits comes from
repairs and parts sold. However, many of the dealerships' service departments aren't open evenings
or weekends. The percentage of dealerships opened during the evenings and weekends are as
follows:

Time Dealerships are Open Percentage of Dealerships

Weekends but not evenings 30.0
Evenings but not weekends 11.2
Both evenings and weekends 8.6

a. Are the listed times mutually exclusive?
b. What is the probability that a car dealership selected at random is not open in the
evenings or on the weekends?
c. Suppose two car dealerships, say, Dealership A and Dealership B, are each selected at
random from car dealerships in the United States. What is the probability that both are open
in the evenings but not on the weekends, or that both are open on the weekends but not in
the evenings?
d. For the two dealerships in part c, what is the probability that Dealership A is open in the
evenings but not on the weekends, and Dealership B is open on the weekends but not in the
evenings?
e. For the two dealerships in part c, what is the probability that one of them is open in the
evenings but not on the weekends, and that the other is open on the weekends but not in the
evenings?


tutor3 : a) Yes the listed times are mutually exclusive.
tutor3 : Please note, due to lack of resources, we can only do 1 problem FREE in 24 hours period. You can always come back tomorrow for another free problem. Please, tell your friends about our free service - 1 free in 24 hours
student : .. LOL
tutor3 : you can mail us your work and we will send in within your deadline once you pay the money quote we send you


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