Question

Encontre o valor da Combinação C(7;4) *
a) 53
b) 35
c) 45
d) 36

Answer 1

Explicação passo-a-passo:

$\sf \dbinom{7}{4}=\dfrac{7!}{4!\cdot(7-4)!}$

$\sf \dbinom{7}{4}=\dfrac{7!}{4!\cdot3!}$

$\sf \dbinom{7}{4}=\dfrac{7\cdot6\cdot5\cdot4!}{4!\cdot3!}$

$\sf \dbinom{7}{4}=\dfrac{7\cdot6\cdot5}{3!}$

$\sf \dbinom{7}{4}=\dfrac{210}{6}$

$\sf \dbinom{7}{4}=35$

Letra B