Question
Mathematics Question on Set Theory
In a class, 20 opted for Physics, 17 for Maths, 5 for both and 10 for other subjects. The class contains how many students ?
A
35
B
42
C
52
D
60
Answer
42
Explanation
Solution
The correct option is (B): 42
In a class, 20 opted for Physics, 17 for Maths, 5 for both and 10 for other subjects. The class contains how many students ?
35
42
52
60
42
The correct option is (B): 42