What are Permutations?
Permutations can be described as follows: if you have made three selections (A, B and C) you can ‘perm’ all the possible doubles. In this case all the doubles possible are AB, AC, and BC; a total of three individual bets, or lines. Similarly, if you have made four selections (A, B, C and D) you can also ‘perm’ all the possible doubles from these four. Now the doubles are AB, AC, AD, BC, BD, CD; a total of six individual bets, or lines.