If n(∪)= 700, n(A) = 200, n(B) = 300 , n(A∩B) = 100, then n(A′∩B′) = 300
400
240
n(A′∩B′) = n(U)−n(A∪B) = 700 - (200+300-100) = 300
If n(∪)= 700, n(A) = 200, n(B) = 300 , n(A∩B) = 100, then n(A′∩B′)
If n(U)=700, n(A)=200, n(B)=300 and n(A∩B)=100, then n(A′∩B′)= ___.