A: 7! and
<span>B: 5040
you only have 7 slots with 7 * 6 * 5 * 4 * 3 * 2 * 1</span>
You have to give every thing that the problem says for me to be able to figure it out.
Nothing changes if you don't add anything.
Example:
10+10=20
20+0=20
nothing changes.
I believe the answer is B
