Question

If A and B are two sets such that n (A) = 7, n (B) = 6 and
(A ⋂ B) ≠ Փ. The least possible value of n (A ∆ B),
is
(a) 1 (b) 7 (c) 6 (d) 13

Answer 1

Answer:

=> (A-B) union (B-A)

=> 7-6 + 6-7

=> 0