Asked by B.B.

How many ways can 9 cars be parked in a row of 9 parking spaces?
Answer: 81 ways
Is this correct?
Thanks for your help.
Answered by bobpursley
No. I would look at the factorial.
Answered by B.B.
I think that I see what I did wrong.
Should it be 9*8*7*6*5*4*3*2*1?
Thanks.
Answered by vai
its 9C9*9!