7..1 PERMUTATIONS
Example 1
Example 2
Example 3 & 4
introduction
Example 5, 6 & 7
Example 8 & 9
Example 10
DIY 2
Example 11
Example 12 & 13
DIY 3
Example 14 & 15
Example 16
Example 17
Example 18
DIY 4
7.2 COMBINATIONS
Example 19
Example 20,21,22, DIY 5
Example 23 & 24
Example 25 & DIY 6