A) 17
B) 9
C) 11
D) 3
E) 16
Correct Answer: D
Solution :
\[n(U)=20,n(A)=12,n(B)=9,n(A\cap B)=4\] \[\therefore \] \[n(A\cup B)=n(A)+n(B)-n(A\cap B)\] \[=12+9-4=17\] Hence, \[n[{{(A\cup B)}^{c}}]=n(U)-n(A\cup B)\] \[=20-17=3\]You need to login to perform this action.
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