Question

Geometry

There are 30 students in a class. They were asked if they have a cat or dog as a pet. 10 kids said they have a cat, 12 kids said they have a dog the rest said they don't have either. Of the kids that said they have a cat or dog, 3 kids said they have both pets.
(Please answer in fraction, decimal, and percent form)


a. How many students do not have either pet?

b. If a student is selected at random what is the probability that they have both pets?

c. If a student is selected at random, what is the probability that they have a cat or dog?

Answer 1

a. 8

b. 1/10

c. 19/30

Explanation:

a. 12 + 10 = 22 30 - 22 = 8

b. 3 students have both, 3/30 simplified is 1/10

not 100% sure about c. but is my best bet