In the question: How many ways can a president, vice-president and treasuer be choosen from an organization with 12 members?
Would i use P(12, 3) =1320 ways
would i use C(12,3)x3!= 1320 ways
does it make a difference?
P(12,3) says you are arranging 3 people out of 12 in some order(here the posts)
C(12,3) x 3! says first you choose 3 guys out of 12 and then you assign them their posts.
Well they are almost similar...