Use the following information to answer the question. Suppose that a recent poll of American households about pet ownership found that for households with a pet, 39% owned exactly a dog, 33% owned a cat, and 7% owned a bird. Suppose that three households are selected randomly and with replacement.
-What is the probability that at least one of the three randomly selected households own a dog? (Round to the nearest hundredth)
A)0.27
B)0.61
C)0.77
D)0.70

Question

Quizplus · Accepted Answer

The probability that a household does not own a dog is 1 - 0.39 = 0.61. The probability that none of the three households own a dog is 0.61^3 = 0.22698. Therefore, the probability that at least one household owns a dog is 1 - 0.22698 = 0.77302, which rounds to 0.77.

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