+**10c2** denotes the number of distinct [Combinations](/wiki/combination) possible when selecting 2 items from a set of 10, where order is irrelevant. This mathematical value, a key concept in [Combinatorics](/wiki/combinatorics), reveals how many unique groups can be formed.
+## See also
+- [Permutation](/wiki/permutation)
+- [Factorial](/wiki/factorial)
+- [Probability](/wiki/probability)