Question

Determine P5 / P3 = 



a( )20

b( )30

c( )24

d( )40

​

Answer 1

Explicação passo-a-passo:

$\sf \dfrac{P_5}{P_3}=\dfrac{5!}{3!}$

$\sf \dfrac{P_5}{P_3}=\dfrac{5\cdot4\cdot3!}{3!}$

$\sf \dfrac{P_5}{P_3}=5\cdot4$

$\sf \dfrac{P_5}{P_3}=20$

Letra A