How many ways can we list the names Bobby, Billy, Mickey, Sally, Betty, Jimmy, Mary, and Fred?

Answer 1

The question simply becomes, in how many ways can you arrange 8 different items ?
You MUST know how to do this if you are studying the topic of combinations and permutations.

Answer 2

It would be 8! because one name can go in 8 different positions, another one can go in 7 different positions, another in 6, and so on.
And, 8!=40320