Question

In a class of 40 students; 30 have taken science; 20 have taken mathematics
and 8 has neither taken mathematic nor science. Find how many students
have taken:
i) both subjects.
ii) exactly one subject

Answer 1

IF THERE ARE 40 STUDENTS,SO HOW 30+20+8=58 CAN TAKE SUBJECTS.......
I THINK THE QUES WOULD BE WRONG OR
ANS IS NOONE