A team consisting of 2 players is to be formed. A combination is an arrangement of objects where order does not matter. An apple and an orange.
B k-combinations from a set with n elements with repetition k-combinations from a set of n elements without repetition is an unordered collection of k not necessarily distinct elements taken from a given set.
The coach knows that there are eight teams but the order the teams play each other does not matter. With 6 5 4 3 2 1 which gives you 720. The combination formula is used to find the number of ways of selecting items from a collection such that the order of selection does not matter. Number of ways of choosing 5 cars 100 C 5 Hence the answer is 100 C 5.