Question

Giving a test to a group of students, the grades and gender are summarized below

A B C Total
Male 12 8 3 23
Female 19 18 4 41
Total 31 26 7 64


If one student is chosen at random,

Find the probability that the student was NOT a male that got a "A"

Answer 1

Twelve students were males who got an A. Therefore there were 52 students who were not males who got an A.

52/64 = 13/16

Answer 2

Giving a test to a group of students, the table below summarizes the grade earned by gender.

A B C Total
Male 18 13 2 33
Female 3 9 14 26
Total 21 22 16 59

If one student is chosen at random, find the probability that the student earned grade B given the student is female. Round your answer to four decimal places.

Answer 3

Giving a test to a group of students, the table below summarizes the grade earned by gender.


A B C Total
Male 12 11 14 37
Female 4 18 16 38
Total 16 29 30 75

If one student is chosen at random, find the probability that the student was not a female and did not earn grade C. Round your answer to four decimal places.