Calculate nCr using Pascals Triangle. This combination calculator n choose k calculator is a tool that helps you not only determine the number of combinations in a set often denoted as nCr but it also shows you every single possible combination permutation of your set up to the length of 20 elements. The combination calculator will return the value of n choose r.
Where n number of items.
Program to calculate value of nCr. On the left side enter the values for the Number of Objects n and the Sample Size r. The formula for a combination is. Calculate nCr using Pascals Triangle.