Question

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 neither a cat nor a dog?

Answer 1

Answer:

Therefore, we get that 7 students surveyed own neither a cat nor a dog.

Step-by-step explanation:

From the exercise we have that

8 students own a cat

15 students own a dog

5 students own both a cat and a dog

We conclude that 23 students have at least one animals, because 8  a cat + 15 a dog = 23 animals.  

The 5 students who have own both a dog and a cat are among these 23 students.

We know that in class have 30 students, we get 30-23=7.

Therefore, we get that 7 students surveyed own neither a cat nor a dog.