3c3

3c3 is a short alphanumeric string that can refer to multiple, unrelated things depending on the context. There is no single definition or canonical meaning for 3c3, so its interpretation must be inferred from surrounding information such as field, domain, or accompanying labels.

In mathematics, 3C3 is commonly encountered as a binomial coefficient notation representing the number of ways to choose 3 items from a set of 3. It is usually written as 3 choose 3 (often denoted as 3C3 or C(3,3)) and equals 1. This usage is part of the broader nCr notation for combinations in combinatorics.

Beyond mathematics, 3c3 frequently appears as an identifier in catalogs, product codes, file names, or database keys. In these contexts, the sequence is simply a label assigned by a manufacturer, distributor, or data system, and its meaning is defined only within that specific system. The same string can appear in different places with entirely unrelated meanings, so context is essential for correct interpretation. Case sensitivity also matters in many systems; 3c3 may denote something different from 3C3.

Because 3c3 is not standardized across disciplines, researchers, engineers, and catalog users should consult the relevant documentation or naming conventions when they encounter the term. See also related alphanumeric patterns such as 3C and C3, which illustrate how small changes in capitalization or surrounding context alter meaning.