combination - a mathematical technique that determines the number of possible arrangements in a collection of items where the order of the selection does not matter
Formula: nPr = n!/r!(n - r)!
Coin CombinationsFree Coin Combinations Calculator - Given a selection of coins and an amount, this determines the least amount of coins needed to reach that total.
Combination with VariableFree Combination with Variable Calculator - Calculates the following:
Solves for r given n and the combination value.
Solves for n given r and the combination value
Combinations with ReplacementFree Combinations with Replacement Calculator - Calculates the following:
How many combinations can we have from a sample of r elements from a set of n distinct objects where order does matter and replacements are not allowed?
Group CombinationsFree Group Combinations Calculator - Given an original group of certain types of member, this determines how many groups/teams can be formed using a certain condition.
Permutations and CombinationsFree Permutations and Combinations Calculator - Calculates the following:
Number of permutation(s) of n items arranged in r ways = nPr
Number of combination(s) of n items arranged in r unique ways = nCr including subsets of sets
