According to a survey of American households, the probability that the residents own two cars if annual household income is over $50,000 is 80%. Of the households surveyed, 60% had incomes over $50,000 and 70% had two cars. The probability that the residents do not own two cars if annual household income is not over $50,000 is ________.
A) 0.12
B) 0.18
C) 0.45
D) 0.70

Question

Quizplus · Accepted Answer

The probability that the residents do not own two cars if annual household income is not over $50,000 is 1 - the probability that the residents own two cars if annual household income is not over $50,000. The probability that the residents own two cars if annual household income is not over $50,000 is 1 - the probability that the residents do not own two cars if annual household income is not over $50,000. The probability that the residents do not own two cars if annual household income is not over $50,000 is 1 - 0.70 = 0.30.

According to a Survey of American Households, the Probability That