Fred owns an oil change shop and is doing some research on car colors. Saturdays are
super busy, so currently there are 30 cars that are in line for an oil change: 5-Red, 7-
Black, 12 - Blue, and 6 - White. Fred has 4 lanes to do oil changes so there are always 4
cars chosen at a time. (Now remember that once the cars are picked for an oil change
they do not return - aka without replacement.)
