+"12c5" is a common notation in [Combinatorics](/wiki/Combinatorics) representing the number of ways to choose 5 distinct items from a set of 12, where the order of selection does not matter. This fundamental concept is crucial in [Probability](/wiki/Probability) theory and statistical analysis.
+## See also
+- [Permutation](/wiki/Permutation)
+- [Set Theory](/wiki/Set_Theory)
+- [Statistics](/wiki/Statistics)
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