Question
Mathematics Question on sets
If A and B are two sets such that n(A∪B) =36, n(A∩B)=16 and n(A-B)=15, then n(B) is equal to
A
21
B
31
C
20
D
52
Answer
21
Explanation
Solution
The correct option is (A): 21
If A and B are two sets such that n(A∪B) =36, n(A∩B)=16 and n(A-B)=15, then n(B) is equal to
21
31
20
52
21
The correct option is (A): 21