<PRE><B>Question 749898</B>
There are 7 choices for the first letter and 7 choices for the second.  Using the fundamental counting principle, there are:

{{{7*7}}}

{{{49}}} 

49 combinations of the two letters.  The choices that would be the same are:
MM, UU, SS, II, AA

So there are 5/49 combinations that would result in the same letter.</PRE>