How do you write all possible selections of three letters that can be formed from the letters A, B, C, D, E, and F?
See a solution process below:
Assuming you can only use each letter once and if order matters:
You have 6 letters you can select for the first letter.
You then have 5 letters you can select for the second letter.
Finally, you have 4 letters you can select for the final letter.
Therefore the possibilities are:
There are 120 ways you can select three letters from 6, using each letter only once and where order matters.