5
3 items (or people) can line up in 6 different sequences. 6 items (or people) can line up in 720 different sequences.
24
15C3 = 455
There are 24 ways to arrange 4 people in a row.
35,280
24 ways.
5
3 items (or people) can line up in 6 different sequences. 6 items (or people) can line up in 720 different sequences.
24
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
There are 24 ways to arrange 4 people in a row.
24, 1*2*3*4
24
You can arrange 4 in 2 ways 1x4 and 2x2.
you can arrange 8 pictures 28 different ways