Aflower shop sold 3.5 times as many roses as lilies last week. which statement is true? a. there were 7 roses sold for every 2 lilies. b. the ratio of roses to lilies is 3 : 5 . c. the ratio of lilies to roses is 5 : 3 . d. if a total of 45 roses and lilies were sold, 10 of them were roses.

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