A and B are two sets and n(A) = 70, n(B) = 60 and n(A∪B) = 110, then n(A∩B) =
A. 240
B. 50
C. 40
D. 20.
Answer:D
A and B are two sets and n(A) = 70, n(B) = 60 and n(A∪B) = 110, then n(A∩B) =
A. 240 B. 50 C. 40 D. 20.