Question

Suppose that 32% of people have a dog, 28% of people have a cat, and 23% of people own both.

What is the probability that someone owns a dog or a cat?

Answer 1

37%

Explanation:

32 + 28 = 60

60 - 23 = 37

Answer 2

37%

Explanation:

Use the general addition rule for any two events:

(32 + 28) - 23

60 - 23

= 37

So, the probability that someone has a dog or cat is 37%