36% of all U.S. households have a pet dog. 34% of all U.S. households have a pet cat. 2% of all U.S. households have a horse, and interestingly- 80% of households with a horse, also own a dog (of course, households with a horse and a dog would also be apart of the 36% with a dog) A U.S. household is chosen at random.
(a). What is the probability it has a dog?
(b). What is the probability it has a dog or a cat?
(c). What is the probability it has a horse?
(d). What is the probability it has a dog and a horse?
Use the 68/95/99.7 rule