Graduate Record Examinations (GRE) Quizzes Mathematics GRE Problem Solving Quiz

Question:
In a class of 78 students 41 are taking French, 22 are taking German. Of the students taking French or German, 9 are taking both courses. How many students are not enrolled in either course?

Option A):
33
Option B):
15
Option C):
24
Option D):
6
Option E):
54

Correct Answer is Option C):
24