If A and B are two sets such that n(A) = 115, n(B) = 326, n (A − B) = 47, then write 
.
Here, n(A)=115 , n(B)=326 , n(A∖B)=47
n(A∖B)=n(A)-n(A⋂B)
∴ n(A⋂B)=n(A)-n(A∖B)
=115-47
=68
Now, n(A⋃B)=n(A)+n(B)-n(A⋂B)
=115+326-68
=373
1
If A and B are two sets such that n(A) = 115, n(B) = 326, n (A − B) = 47, then write .
Here, n(A)=115 , n(B)=326 , n(A∖B)=47
n(A∖B)=n(A)-n(A⋂B)
∴ n(A⋂B)=n(A)-n(A∖B)
=115-47
=68
Now, n(A⋃B)=n(A)+n(B)-n(A⋂B)
=115+326-68
=373