Combination Calculator
This combination calculator finds the number of combinations, nCr, the standard count of ways to select r items from a group of n distinct items, calculated as n! ÷ r! × (n − r)! Just enter the total number of items (n) and how many you’re selecting (r), and it instantly returns the result (for example, 5C3 = 10).
It saves you from working through the factorial arithmetic by hand, which grows large quickly. It’s built for students learning probability and discrete math, teachers demonstrating the concept, and anyone in data science, engineering, or research who needs a fast, accurate nCr calculation.
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