Assume that among households with an annual income over $100,000 , 75% own SUVs, while among households with an annual income under $100,000 , only 25% do. Households making over $100,000 make up one quarter of all households in the country. What are the odds that an SUV driver's household income is over $100,000 ?

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297