Question

I need help please help me

Answer 1

`_(n)P_(k)=(n!)/((n-k)!)`

`_(12)P_(3)=(12!)/((12-3)!)=(12!)/(9!)=(12*11*10*9*8*7*6*5*4*3*2*1)/(9*8*7*6*5*4*3*2*1)=(479,001,600)/(362,880)=1,320`

OR


`_(12)P_(3)=(12!)/((12-3)!)=(12)/(9!)=(12*11*10*9*8*7*6*5*4*3*2*1)/(9*8*7*6*5*4*3*2*1) = 12*11*10 = 1,320`

Answer 2

12P3
= 12 x 11 x 10 x 9! / 9!
= 12 x 11 x 10
= 1320