In a class of 40 students, 32 offer mathematics, 24 offer physics and 4 offer neither mathematics nor physics. How many offer both mathematics and physics?
A
4
B
8
C
16
D
20
Verified Correct Answer: D.
Step-by-Step Mathematical Solution
40 = 32 - x + x + 24 + 4
40 = 60 - x
x = 60 - 40
x = 20
Source: Myschool Past Questions Archive (Record #56860)