Australian AMC 2010 - Middle Primary Question 7

Question 7

The following tally was made by a Year 4 class about the pets they had at home.

Which one of the following statements is correct?

1. There were more birds than fish.
2. There were more dogs than cats.
3. The class had 30 pets altogether.
4. The least popular pet was a bird.
5. The most popular pet was a cat.