Marlene needs to purchase at least 50 party decorations. the party palace charges $0.50 per decorative streamer and $0.25 per balloon, including tax. which combination of streamers and balloons can marlene purchase with $19.50 at the party palace?

a. 35 streamers and 15 balloons

b. 31 streamers and 18 balloons

c. 28 streamers and 23 balloons

d. 26 streamers and 25 balloons

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