Select 2 unique numbers from 2 to 17
        Total possible combinations (ways)
        
If order does not matter (e.g. most lottery numbers): 120
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 240
            
                If order does not matter (e.g. most lottery numbers): 120
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 240



