Andrew has 48 country cds and 72 rock cds. he wants to arrange them on shelves so that the two types of cds are separate, but he wants the largest number of cds on a shelf as possible. how many cds should he put on each shelf?

Andrew should create shelves that hold 24 cd's each. This will accomplish two things - first, he will only need five shelves, which will take up limited space and distribute the weight load evenly on his wall. Secondly, while there will be 2 shelves of country cd's and 3 shelves of rock cd's,, there will not be an excessive amount on any one shelf, and he'll be able to find the cd he is looking for rather quickly.