Question

QUESTION 17

1. If A = { 1, 2, 3, 4 }    B = {  3, 4, 5 }   C = { 5, 7, 8, 9 }

   then A ∩   C U  B  equals

   		{ 3, 5 }
   		{ 3, 4, 5 }
   		{ 4, 5 }
   		None of the above

2. QUESTION 19

3. What is the Cartesian product A x B given  A = {1, 2} and B = {a, b}?

   		{ (1, a), (1, b), (2, a), (b, b) (a, a)}
   		{ (1, 1), (2, 2), (a, a), (b, b) }
   		{ (1, a), (2, a), (1, b), (2, b) }
   		{ (1, 1), (a, a), (2, a), (1, b)}

4. QUESTION 21

5. If A = { 1, 2, 3, 4 }    B = {  3, 4, 5 }   C = { 5, 7, 8, 9 }

   then A U B ∩   C   equals

   		{ 5 }
   		{ 3, 5}
   		{ 1, 2, 4, 5 }
   		None of the above

6. QUESTION 34

7. Given the following sets A = {1, 2, 3} and B = {a, b}, which of the following are functions given the Cartesian product A x B?

   a { (1, a), (2, b), (3,b) }
   b { (1, a), (2, a), (3, a) }
   c { (1, a), (2, a), (1, b), (3, a) }
   d { (1, a) }

   		a  b  d
   		a  b  c  d
   		a b
   		a  b  c

Answer 1