Respostas

  • Ind
  • Ambicioso
2013-12-04T16:25:05-02:00
C10,2 e C12,2 = C10,2 . C12,2
 \frac{10!}{2!(10-2)!}= \frac{10.9.8!}{2.8!}
corta o 8!
C10,2 = 90/2 = 45

C12,2 =  \frac{12!}{2!(12-2)!} =  \frac{12.11.10!}{2.10!}
Corta o 10!
C12,2 = 6.11 = 66

Resposta = 45 . 66 = 2970