Question

If n (A ∩ B) = 3 and n(A ∪ B) = 10, then find n(P(A ∆ B))

Answer 1

n(A ∪ B) = 10; n(A ∩ B) = 3

n(A ∆ B) = 10 – 3 = 7

and n(P(A ∆ B)) = 27 = 128