Flashcard 8 - Quantitative Reasoning Flashcard Set for the DAT

combinations—selecting items where the order doesn’t matter

permutations —arranging items where the order does matter

Combinations focus solely on the selection of items, considering them as unordered sets, while permutations consider both the selection and the order in which they’re arranged. This difference is fundamental in statistics, as sometimes the order of a set matters and sometimes it does not.