Select the correct answer A school bus has 25 seats, with 5 rows of 5 seats. 15 students from the first grade and S students from the second grade travel in the bus. How
many ways can the students be seated if all of the second-grade students occupy the first row?
OA SP20
OB. Ps x 20P
OCCH
OD. SPS SPS
OE Ps 2.C

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