What is a combination?
A combination is a grouping of distinct objects without regard to the order in which the grouping is made.
As an example, a poker hand is a combination - we don't care in what order we're dealt the cards, only that we're holding a Royal Flush (or a pair of 3s).
The formula for finding a combination is:
As a for instance, the number of possible 5-card poker hands is:
Let's evaluate it!