A) \[n(A)\]
B) \[n(B)\]
C) \[n(A)+n(B)\]
D) \[n(A)\,.\,n(B)\]
Correct Answer: C
Solution :
Since A and B are disjoint, \\[A\cap B=\varphi \] \[n(A\cap B)=0\] Now \[n\,(A\cup B)=n(A)+n(B)-n(A\cap B)\] \[=n(A)+n(B)-0\]\[=n(A)+n(B)\].
You need to login to perform this action.
You will be redirected in
3 sec
