Question

consider the six letters a,b,c,d,e,f. in how many ways can four letters be selected and arranged if repetition is not allowed?

Answer 1

Well if you have six letters, and looking for something without repetition it is very simple.I'll do two for you and you do the rest, okay?

Answer 2

a b c d
f e b a

Answer 3

i have
6,60,120,360 as option

Answer 4

i know how to do it lol

Answer 5

then why did you ask the question?

Answer 6

to see if there was a formula

Answer 7

hm, n*n=a