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Combinations and letters

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by sandsmiley » Fri Sep 04, 2009 7:23 am
26^4 + 26^5 = 26^4(26 + 1) = 27(26^4)
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by tom4lax » Fri Sep 04, 2009 5:31 pm
Am I the only one who thinks the question isnt clear as to whether we can repeat the letters or not??

I started 26!/22! + 26!/21! until I realized I was nowhere near the answer...
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