There are 32 students in a statistics course.  25 percent of the class received an A.  1/4 of the remaining students got either a B or C, and the rest of the students failed.  How many students failed?
A grade:32(.25)=8
32-8=<T>subtract(32, 8)=24 students remaining
B/C grade:24/4=<T>divide(24, 4)=6.0
24-6=<T>subtract(24, 6)=18 students fail
