The students at a university are to be given a unique ID number that consists of two letters (any of the 26 letters) followed by three digits (0 through 9), all of which can
repeat. How many possible ID numbers can be generated?

Evaluate the following expression 1/3^2

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

Find the solution of each of the following.