Mrs Bollo's Second Grade Class of Thirty Students Conducted a Pet

Multiple Choice

Mrs. Bollo's second grade class of thirty students conducted a pet ownership survey. Results of the survey indicate that 8 students own a cat, 15 students own a dog, and 5 students own both a cat and a dog. How many of the students surveyed own no dogs?

A) 15
B) 8
C) 20
D) 3