Require a permutations/combinations calculator for First 4 (Superfecta) and Trifecta bet types.
Fairly simple, just need the ability to select checkboxes of the runners (out of 8) that will come
(For the first 4)
(For the trifecta)
There is fair more maths involved then meets the eye, as I will not just be boxing selections.
Please bid if you have done something similiar before, have looked at some examples and understand what is required or even have a script ready to go. Be warned, a number of people online have provided formulas for calculation but the majority of these are wrong so if you have no prior experience a little bit of research will be required.
Must be written in PHP.