The janitor of a high school is extremely efficient By the end of each day all of the schools waste is in plastic bags weighing between 101 pounds and 300 pounds All plastic bags are then taken to the trash bins outside One trip is described as selecting a number of bags which together do not weigh more than 300 pounds dumping them in the outside trash can and returning to the school Given the number of plastic bags n and the weights of each bag determine the minimum number of trips the janitor has to make