Calculating Combinations Without Repetition 1. Scroll down the page for more examples and solutions on how to use the combination formula. Enter 30 for Number of sample points in set.
Enter 30 for Number of sample points in set.
If we want to figure out how many combinations we have we just create all the permutations and divide by all the redundancies. The number of combinations is always smaller than the number of permutations. N - r where n represents the total number of items and r represents the number of items being chosen at a time. You are essentially reducing the.