simple equation

[jay_shark]

Pocket pair : (4*3)/2

For any rank , there are 4 ways to select a suit . Once this is fixed , there are 3 additional ways to select another suit . Finally we divide by two to avoid double-counting .

non pocket pair : 4*4=16

There are 4 ways to select a suit from each denomination so we multiply 4*4 = 16 .