**Calculadora De CombinaÃ§Ãµes**

What about doing a command or a calculator? 3

Command 20.5 How to do it? ■■■■■■ tried but there are too many of them.

C20.5 = 20! / 5! Fifteen! =

= 20x19x18x17x16x15! / 5! * Fifteen!

= 20x19x18x17x16 / 5!

= 15,504

Well, the scientific calculator, for the nCr key 20 After and After or 5, maybe em is equal to 15504

Att

Before using the calculator

C (n, k) = n! / K! (NK)!

C (20.5) = 20! / 5! Fifteen! = 20.19.18.17.16.15! / (120.15!) = 20.19.18,17.16 / 120

C (20.5) = 20.19.18.17.16 / 120 = 20.6.3.19.17.16 / 6 * 20 = 3.19.17.16 = 15504