Question

If A and B are two sets such that n (A) = 7, n (B) = 6 and
(A ⋂ B) ≠ Փ. Then the greatest possible value of n (A ∆ B),
is
(a) 11 (b) 12 (c) 13 (d) 10

Answer 1

the greatest possible value of n(A∆B)is 13