Question

a college student purchased 10 posters for her dorm room but she only has space to hang six of them. how many specific ways can students arrange and hang these six posters on her wall

Answer 1

151,200 ways she could do it

Answer 2

As in the given question, arrangement is involved so we use permutation to this problem.
As, 10 posters are available but we arrange only 6 of them
So,
                                    10P6=151200 ways