Question

Let U = {q, r, s, t, u, v, w, x, y, z} A = {q, s, u, w, y} B = {q, s, y, z} C = {v, w, x, y, z}. Determine the following. A' ∪ B

Answer 1

So
A' is everything that's in 'U' but not in 'A'
B is everything in B
the symbol in the middle is OR

So you want everything that isn't in 'A' together with everything that's in 'B'