Combination Calculator (nCr)
Understanding Combinations (nCr)
A combination is a selection of items from a set where the order of selection does not matter. It calculates the number of ways to choose 'r' items from a set of 'n' items.
Formula
The number of combinations is calculated as:
\[ C(n, r) = \binom{n}{r} = \frac{n!}{r!(n-r)!} \]
Where 'n' is the total number of items, and 'r' is the number of items to choose.
Calculate the number of unordered selections.
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