Eighteen individuals are scheduled to take a driving test at a particular dmv office on a certain day, seven of whom will be taking the test for the first time. suppose that six of these individuals are randomly assigned to a particular examiner, and let x be the number among the six who are taking the test for the first time. (a) what kind of a distribution does x have (name and values of all parameters)

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

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

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?