Question

there are 8 students in a class. The students read a book. Howmany arrays can be made if they arrange themselves in different arrays?

Answer 1

Perms question

Since there are 8 students, you say 8! or 8 factorial
8*7*6*5*4*3*2*1
8 first because there are 8 possible choices, 7 for the next one since one student has already been chosen, and so on.
Answer is 40320