Question:

Outside a home, there is a 6-key keypad with letters A, B,

Last updated: 7/19/2022

Outside a home, there is a 6-key keypad with letters A, B,

Outside a home, there is a 6-key keypad with letters A, B, C, D, E and F that can be used to open the garage if the correct six-letter code is entered. Each key may be used only once. How many codes are possible? The number of possible codes is