To see a definition, select a term from the dropdown text box below. The statistics dictionary will display the definition, plus links to related web pages.
A combination is a selection of all or part of a set of objects, without regard to the order in which objects are selected.
For example, suppose we have a set of three letters: A, B, and C. We might ask how many ways we can select 2 letters from that set. Each possible selection would be an example of a combination. The complete list of possible selections would be: AB, AC, and BC.
Computing the number of combinations.
The number of Combinations of
at a time is:
All Red Chuck Star 2018 Converse Sneaker Top Seasonal High Taylor
Star Taylor Converse Chuck 2018 Red All Seasonal Top High Sneaker
r = n(n - 1)(n - 2) ... (n - r + 1)/r! = n! / r!(n - r)! =
r / r!
Note that AB and BA are considered to be one combination, because the order in which objects are selected does not matter. This is the key distinction between a combination and a permutationRosewood Women's Adinis LK Lucky Sandal nqSYxYP. A combination focuses on the selection of objects without regard to the order in which they are selected. A permutation, in contrast, focuses on the arrangement of objects with regard to the order in which they are arranged.