A) 373
B) 375
C) 300
D) None of these
Correct Answer: A
Solution :
[a] \[\because \]\[n(A-B)=n(A)-n(A\cap B)\] \[\Rightarrow \] \[47=115-n(A\cap B)\] \[\Rightarrow \] \[n\,(A\cap B)=68\] Then, \[n\,(A\cup B)=n\,(A)+n\,(B)-n\,(A\cap B)\] \[=115+326-68=373\] |
You need to login to perform this action.
You will be redirected in
3 sec