A pet store surveyed 420 people to see how many own a dog and how many own a cat. The Venn diagram below shows the results. (Each number gives the number of people who fall into that Venn diagram category.) -All people in the survey (a) How many of the people do not own a cat? Own a dog Own a cat 31 223 45 45 people 121 (b) How many of the people own both a dog and a cat? people (c) How many of the people own a dog or a cat (or both)? people