In a survey of 97 pet owners, 48 said they own a dog, and 11 said they own a cat. 3 said they own both a dog and a cat. How many owned a dog but not a cat?

Answer 1

d= 48

c = 11

d&c = 3

97 = d + c - d&c + n where n= neither a cat or dog owner

97 = 48+11-3 + n

97 = 56 + n

n = 97-56 = 41 owned neither dog or cat

how many owned a cat but not a dog?

11-3 = 8 cat owners who don't own a dog