Select 15 unique numbers from 5 to 20
Total possible combinations (ways)
If order does not matter (e.g. most lottery numbers): 16
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 20,922,789,888,000 (~20.9 trillion)
If order does not matter (e.g. most lottery numbers): 16
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 20,922,789,888,000 (~20.9 trillion)