2. {y}.
6. One possible answer is 5 subsets to form a partition based
on the grade (i.e., A, B, C, D, or F) on the last test.
10. The two Venn Diagrams should be shaded the same.
14. 32+48-12 = 68.
18. 35+21-5 = 51.
22. n(B-A) = 8.
26. 1,000-138 = 286+560+93-(x+y). So, (x+y) = 77.
30. n(AuBuC) = n(A)+n(B)+n(C)-n(A^B)-n(A^C)-n(B^C)+n(A^B^C).
