Question
Mathematics Question on Operations on Sets
If A and B are disjoint sets and n(A)=4 ,n(A∪B)=7, then the value of n(B) is
A
7
B
4
C
3
D
11
Answer
3
Explanation
Solution
The correct option is (C): 3
If A and B are disjoint sets and n(A)=4 ,n(A∪B)=7, then the value of n(B) is
7
4
3
11
3
The correct option is (C): 3