If n(∪)=1000, n(A) = 400, n(B) = 500 , n(A∩B)=100, then n(A′∩B′)

If n(∪)=1000, n(A) = 400, n(B) = 500 , n(A∩B)=100, then n(A′�

1.	If n(∪)=1000, n(A) = 400, n(B) = 500 , n(A∩B)=100, then n(A′∩B′)
Answer» If $n (\cup) = 1000$ , n(A) = 400, n(B) = 500 , $n (A \cap B) = 100$ , then $n (A^{^{'}} \cap B^{^{'}})$