SubArea: CombinatoricsLevel: AProject ID: 1003024611Accepted: 1Clonable: 0Easy: 0On a lock of a safe deposit box a ten-digit code can be set. The code can consist only of four 1s, three 2s, two 3s, and one 4. How many ways are there to set the code?10!4!⋅3!⋅2!=1260010!4!+3!+2!=11340010!−4!⋅3!⋅5!=362851210!=3628800
