Question 616187
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi, 
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}. 
(B &#8745; C) = {y,z}
A &#8746; (B &#8745; C) = {q, s, u, w, y,z}