(x + y + 2)(y + 1)

a. y2 + 4xy + 2
b. xy + 4y + x + 2
c. y + x + y + 2
d. y2 + xy + x + 3y + 2

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