A survey was given to 349 people asking whether people like dogs and/or cats. 197 said they like dogs 178 said they like cats 51 said they don't like cats or dogs. How many said they liked cats but not dogs?
349 - 51 = 298 like either cats or dogs
197 + 178 - 298 = 77 like cats and dogs
197 - 77 = 120 like dogs but not cats
178 - 77 = 101 like cats but not dogs
