4*3*2*1 = 24 ways.
Answer: 6 There are 3 choices for the first kid, 2 for the remaing kids and then only 1 space left for the kid at the end of the line. 3x2x1=6 ways.
There are 19 ways to do this.
1. 1232. 1323. 2314. 2135. 3216. 312
120 ways.120 ways.120 ways.120 ways.
25
There are 5040 ways.
4*3*2*1 = 24 ways.
7
20*19*18*17*16 = 1860480 ways.
Answer: 6 There are 3 choices for the first kid, 2 for the remaing kids and then only 1 space left for the kid at the end of the line. 3x2x1=6 ways.
This is a question of permutation. There are only 3 ways. A-B-C, B-C-A, C-A-B
First in line can be any of the 4, second any of the remaining 3, third one of the other 2, so there are 4 x 3 x 2 ie 24 different ways.
10!, which is pronounced "10 factorial". This is calculated as 1 x 2 x 3 x 4 ... x 10.
3
7
There are 19 ways to do this.