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Question:

Twelve percent of all US households are in California. A total of 1.3 percent of all US households earn more than $250,000 per year, while a total of 3.3 percent of all Carlifornia households earn more than $250,000 per year.

a) What proportion of all non-California households earn more than $250,000 per year?

b) Given that a randomly chosen US household earns more than 250,000 per year, what is the probability it is a California household?