A professor at a loca community noted that the grades of hi s students were normally distrubuted with a mean of 74 and a standard deviation of 10.The prof has informed us that 6.3 percent of his students received A's while only 2.5 percent of his students failed the course and received F's.
a. what is the minimum score needed to make an A.
b. what is the minimum score among those who received an F.
C. If tere were 5 students who did not pass the course,how many students took the course.