If A = {1, 2, 4}, B = {2, 4, 5} and C = {2, 5}, write (A − C) × (B − C).
Here, A={1,2,4} ,B={2,4,5} ,C={2,5}
So, A ∖ C={1,2,4} ∖ {2,5}
={1,4}
Also,B ∖ C={2,4,5}∖ {2,5}
={4}
Now, (A ∖ B)×(B ∖ C)={(x,y):xϵ(A∖ C) and yϵ(B∖ C) }
={(1,4), (4,4)}