First, draw venn diagram and determine how many people own both cat and dog. See image attached. x represents the number of people own both cat and dog dog only owner + cat only owner + both cat and dog owner = 375 215 - x + 193 - x + x = 375 408 - x = 375 x = 408 - 375 x = 33 The number of people own both cat and dog is 33
Second, find the number of people own dog only dog only = 215 - 33 dog only = 182 The number of people own dog only is 182