3 items (or people) can line up in 6 different sequences. 6 items (or people) can line up in 720 different sequences.
15C3 = 455
5
you can arrange three beads 9 different ways.
8
3 items (or people) can line up in 6 different sequences. 6 items (or people) can line up in 720 different sequences.
The number of different ways that you can arrange 15 different items is given by the permutations of 15 things taken 15 at a time. That is 15 factorial, or 1,307,674,368,000.
15C3 = 455
35,280
you can arrange 8 pictures 28 different ways
5
you can arrange three beads 9 different ways.
120 ways
8
8! = 40320 ways.
There are 30 ways.
24 ways