How many combination of players can a coach have if he needs to pick 2 out of a total of 4

6 combos. This is the only way i can explain because I did it in my head. imagine each person as a number 1-4. You can't have the same two people together. 1&2 is a combo, so are 1&3, 1&4, 2&3,2&4,4&3