en.wikipedia.org/wiki/Combination

In mathematics, a combination is a way of selecting items from a collection, such
that (unlike permutations) the order of selection does not matter. In smaller cases
it is possible to count the numb...

www.mathwords.com/c/combination_formula.htm

Combination Formula. A formula for the number of possible combinations of r
objects from a set of n objects. This is written in any of the ways shown below.

www.mathsisfun.com/combinatorics/combinations-permutations.html

In English we use the word "combination" loosely, without thinking if the order of
.... So we adjust our permutations formula to reduce it by how many ways the ...

betterexplained.com/articles/easy-permutations-and-combinations/

Let's start with permutations, or all possible ways of doing something. ... Writing
this out, we get our combination formula, or the number of ways to combine k ...

www.mathplanet.com/education/algebra-2/discrete-mathematics-and-probability/permutations-and-combinations

One could say that a permutation is an ordered combination. ... to determine the
correct number of permutations we simply plug in our values into our formula:.

www.khanacademy.org/math/precalculus/prob-comb/combinations/v/combination-formula

The first time you're exposed to permutations and combinations it takes a little bit
to get your brain around it, so I think it never hurts to do as many examples.

stattrek.com/online-calculator/combinations-permutations.aspx

Finds the number of combinations and permutations that result when you choose
r ... Each possible arrangement would be an example of a permutation.

www.calculatorsoup.com/calculators/discretemathematics/combinations.php

The Combinations Calculator will find the number of possible combinations that
can be obtained by ... Looking at the formula, we must calculate “6 choose 2.”.

study.com/academy/lesson/how-to-calculate-the-probability-of-combinations.html

To calculate the probability of a combination, you will need to consider the
number of favorable ... Calculating Possible Outcomes: Definition & Formula.

www.freemathhelp.com/combinations.html

Now, how do we calculate the number of possible combinations? Use the
following formula ... The rest of the formula is more straightforward. Remember
that the ...