Let S = { 1 , 2 , 3 , ... , 18 , 19 , 20 } be the universal set. Let sets A and B be subsets of S , where: Set A = { 2 , 4 , 5 , 7 , 8 , 9 , 11 , 14 } Set B = { 1 , 2 , 5 , 7 , 8 , 10 , 11 , 14 , 15 , 18 , 19 , 20 } Determine the following: n ( A ) = n ( ¯¯¯ A ) = n ( B ) = n ( A ∩ B ) = n ( A ∪ B ) =
