**Problem : ** If *X* = { -1, 2, 9, 3, 0} and *Y* = {2, 0, 1, 3, -9}, what is *X*∪*Y* ?

*X*∪*Y* = { -9, -1, 0, 1, 2, 3, 9}
**Problem : ** If *X* = { -1, 2, 9, 3, 0} and *Y* = {2, 0, 1, 3, -9}, what is *X*∩*Y* ?

*X*∩*Y* = {0, 2, 3}
**Problem : ** Draw a Venn diagram for {1, 2, 3, 4, 8, 9}∪{1, 3, 4, 6}.

**Problem : ** If *X* has 4 members, *Y* has 6 members, and *X*∩*Y* has 2 members, how many members does *X*∪*Y* have?

8
**Problem : ** If *A* has 5 members, *B* has 3 members, and *A*∪*B* has 6 members, how many members does *A*∩*B* have?

2
**Problem : ** Draw a Venn diagram for { -3, -2, -1, 0}∩{0, 1, 2, 3}