the world as we know it. the purpose of each level is to collect as much money before the time runs out. the station also has frequent services to as far away as chester. and for , to get the probability that a particular one of the  items is going to be the next one seen, we need to divide this probability (of seeing some item that has been seen r times) among the  possibilities for which particular item that could be. of it is land and  of it (1.07%) is water. the city has a staff of 150 lifeguards. 