FennaG265960
FennaG265960
26-10-2022
Mathematics
contestada
a) 7C₂ =(Simplify your answer.)
Respuesta :
KorleeI446974
KorleeI446974
26-10-2022
This is a combination of the form:
[tex]\begin{gathered} C(n,k)=nCk=\frac{n!}{k!(n-k)!} \\ where: \\ n>k \end{gathered}[/tex]
So:
[tex]7C_2=\frac{7!}{2!(7-2)!}=\frac{7!}{2!\cdot5!}=\frac{5040}{2\cdot120}=\frac{5040}{240}=21[/tex]
Answer:
21
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