Question

People were surveyed about pizza toppings. The results are shown in the Venn diagram. How many people don't like mushrooms?

10
13
20
21

Answer 1

13

Explanation:

Answer 2

It would be 13 because if you add 3,6,and 4you get 13. Also you should add those because they are the only numbers not in the mushroom circle of the Venn diagram.