Combinations Calculator

How to use it

1. Verify that r ≤ n
2. Calculate the factorial of n
3. Calculate the factorial of r and (n-r)
4. Apply the formula of combinaciones

Common mistakes

• ⚠️ Use r greater that n
• ⚠️ Confusing combinacion is with permutaciones
• ⚠️ Values negative

Worked example

Calculate C(52,5).

The combinacion is cuentan grupos where the orden NO importa.

Input guide