He ratio of girls to boys on a soccer team is 2 to 3. If there are 25 players on the team, how many of them are girls? A) 10
B) 12.5
C) 15

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

I’m stuck on this equation, anyone got the answer?

The value of the expression 16-^3/4 8 1/8 -6 6 1/40 1/64