CalcCalculadora Combinacoes
Last updated: 2026-08-24
Calculadora Combinacoes — Calcule C(n,k) = n! / (k! × (n-k)!). Exemplo: How many ways to choose 3 people from a group of 10? = C(10,3) = 120. Calculadora gratuita e precisa, sem registo.
Inputs
Result
Enter values and press Calculate
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How to use it
- Verificar que r ≤ n
- Calcular o factorial de n
- Calcular o factorial de r e (n-r)
- Aplicar a fórmula de combinaciones
Common mistakes
- ⚠️ Usar r mayor que n
- ⚠️ Confundir combinaciones com permutaciones
- ⚠️ Valores negativos
Worked example
Calcular combinaciones posibles
Las combinaciones cuentan grupos onde o orden NO importa.
Input guide
| Field | Typical range |
|---|---|
| r | 0-170 |
| n | 0-170 |