Given: A = {x, y, z} and B = {1, 2}

∴ A × B = {(x,1), (x,2), (y,1), (y,2), (z,1), (z,2)}

⇒ n(A × B) = 6

Then number of subsets of set (A × B) = 2ⁿ = 2⁶

⇒ number of relations from A to B = 2⁶.