A) 4, 7
B) 7,11
C) 4, 11
D) None of these
Correct Answer: B
Solution :
\[n(A\cup B)\]is minimum when\[A\le B,\]then \[n(A\cup B)=n(B)\] \[=7\] \[n(A\cup B)\]is maximum when\[A\cap B=\phi ,\] then\[n(A\cup B)=n(A)+n(B)\] \[=4+7=11\]You need to login to perform this action.
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