Question:How many 55-letter code words can be formed from the letters U,
G, S, E, A...
Question
How many 55-letter code words can be formed from the letters U,
G, S, E, A...
How many 55-letter code words can be formed from the letters U,
G, S, E, A if no letter is repeated? If letters can be repeated?
If adjacent letters must be different?