This Combinations Calculator will read n (number of objects) and r (sample size) from user, computes the number of possible combinations for given inputs, in a detailed step by step solution.
Inputs
Sample inputs
n: 10 r: 4
n: 5 r: 2
n: 14 r: 10
How to Calculate Number of Combinations?
Follow these steps to calculate the number of combinations to select r number of objects from a total of n number of objects.
Get the value of n (total number of objects), and r (sample size).
The Combination Formula to get the possible number of combinations to select r number of objects from a total of n number of objects is:
\({{}^{n}C_{r}} = \frac{n!}{r!(n-r)!}\)
Substitute the values of given n and r in the above formula.
Compute the factorials, and simplify the right hand side value.