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,](https://media.kunduz.com/media/sug-question/raw/40212364-1658232094.3508153.jpeg?h=512)
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