Joe, amy, bill, and ted each bought a cake at a bake sale. joe ate 0.9 of his cake. amy ate 3/5 of her cake. bill ate 0.5 of his cake, and ted ate 3/4 of his. of the four cakes, how much do they have left

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

Abag contains 10 white golf balls and 6 striped golf balls. a golfer wants to add 112 golf balls to the bag. he wants the ratio of white to striped gold balls to remain the same. how many of each should he add?

Of the 304 people who attended a school play, 5/8 were students. how many of the people who attended were students.