In school V, all students must take at least one of Mathematics, Physics, or Biology. If none of the students took 3 classes, the number of students who took Mathematics class is 18, the number of students who took Physics class is 23, and the number of students who took Biology class is 20. And also 3 students took both Mathematics class and Physics class, 8 students took both Physics class and Biology class, and 6 students took both Biology class and Mathematics class. What is the total number of students in school V?
A. 11
B. 22
C. 33
D. 44
E. 55![]()
A. 11
B. 22
C. 33
D. 44
E. 55
