Select 2 unique numbers from 0 to 9
Total possible combinations (ways)
If order does not matter (e.g. most lottery numbers): 45
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 90
If order does not matter (e.g. most lottery numbers): 45
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 90