Hi, I'm not talking about the regular charts of odds I can find everywhere. I learn better when I understand how things are done. What I want to have is the formula to calculate the odds. I want to understand how when you have 10 OUTS you are:

1 in 4.7 (on the turn)
1 in 4.6 (on the river)
1 in 2.6 (on either the turn or the river)

Now, I think you do:

47/OUTS (for the turn)
46/OUTS (for the river)

But, I can't figure out how you calculate the (turn & river) combined and get to the 1 in 2.6 (with 10 outs).

Thanks for the help