Question

In a class,30 students passed in math,20 passed in physics and 8 passed in both. how many students failed in both if the class has 45 students?

Answer 1

student math=30
student phys=20
student in both=8(the students are already counted in maths and physics).

A.T.Q
30+20-8=42.
THEN THE NO. OF STUDENTS FAILED ARE =
TOTAL STUDENTS - STUDENTS PASSES
45 - 42=3