The SAT Math section will include a few questions that require you to work with combinations. A combination is just an unordered grouping of elements (for example, if you have two children, how many gender combinations are there?). But you don't need to get hung up on the category; you just need to figure out what the question is asking for. Let's take a look at an example:

Jeff is choosing a frame for his painting. Frames come in 3 different materials (metal, plastic, and wood) and 4 different colors (gold, silver, bronze, and white). How many different types of frames can Jeff buy?