Cardinality of Set of Subsets/Also denoted as

Theorem
The number of subsets of cardinality $m$ that can be taken from a set of cardinality $n$ can also be seen as:
 * ${}_n C_m$
 * ${}^n C_m$
 * ${C_n}^m$

In order to avoid any ambiguity, will tend to use $\dbinom n m$.