Permutation questions- urgent help needed

pckeller
Thu, 24 Jan 2013 14:03:42 +0000

44 it is!

And there are two ways to go about it (besides listing).


Break it into two cases: consonant consonant and vowel anything
First figure out how many two letter codes there are of any variety. Then, subtract the number of consonant vowel combos.


p.s. I think I have Dr Steve’s answer! If I am right, it is a very simple and elegant answer. What I don’t have yet is a simple and elegant explantion to go with it! Stay tuned.