We now consider subsets of a given size. How many subsets of a given size can be created from the elements of a given set when order is not a concern? This is a good question when deciding how to part...We now consider subsets of a given size. How many subsets of a given size can be created from the elements of a given set when order is not a concern? This is a good question when deciding how to partition supply to meet demand when a given number of units are required, without specifying which units.