Question 993972
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A. 3 ways to choose the first letter, then 25 ways to choose the second letter,  then 24 ways to choose the third letter, and so on.  So:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 3\ \times\ 25\ \times\ 24\ \times\ 23\ \times\ 22\ \times\ 21\ \times\ 20]


Of course, you have to use the mathematician's definition of a seven-letter word which is just a group of seven letters that do not necessarily have meaning as a word in any particular language.  You must also assume though the problem did not specify, that the available letters come from the standard 26 character English alphabet.


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it

*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \