83 cities were surveyed to determine sports teams. 24 had baseball, 20 had football, 17 had basketball, 10 had baseball and football, 9 had baseball and basketball, 10 had football and basketball. 3 had all three. (a) Let A = baseball, B = football, C = basketball. How many had only a baseball team? C U (b) How many had baseball or football? (c) How many had baseball or football, but not basketball? B I II III V IV VI VII C VIII