If A={2,3,5}. Find `A cup phi and phi cup A` and compare.

{phi} = phi

If A={6,9,11}, B={}. Find A cup phi .

If A={0,2,4}, find A cap phi and A cap A . Comment.

If A={1,2,3,4} and B={2,4,6,8}. Find A cup B

If A={1,2,3,4} and B={1,2,3,4,5,6,7,8}, then find A cup B and A cap B . What do you notice about the result?

Let A={2,5,6,8} and B={5,7,9,1}. Find A cup B

n(U)= 150, n(A)= 75, n(B)= 57, n(C )= 65, n(A cap B)=37, n(A cap C)= 36, n(B cap C)= 25" and "n(A cap B cap C)= 19 , then find n(A cup B cup C), and "n(A' cup B' cup C') .

If A= {3, 5, 7, 9, 11}, B= {7, 9, 11, 13}, C= {11, 13, 15}" and "D= {15, 17} , find A cup D, B cup C, (A cup D)cap (B cup C)