Question

If a group of distinct objects can be arranged in 120 different ways, how many objects are there?

Answer 1

this is a matter of knowing your factorials. since arrangements are usually the factorial of how many there are to arrange, we can work backwards.

1! = 1
2! = 2
3!= 3
4! = 24
5! = .........

Thats right! try putting these into your calculator by typing the number and then pressing ALPHA + WINDOW (at the top) and then choosing 9

Answer 2

Thank you so much