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How many different 3-letter combinations can you make with the following letters: g, m, e, t, & x?

hint: mge & egm use the same letters but in a different combination.

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If we can repeat the letter then the number of words =5*5*5
=625
because we have to fill three ( _ _ _ ) space with the help of these 5 letters
We can fill first space by all the 5 letters
and next space we can fill by all the 5 letters
and next space we can fill by all the 5 letters
so total number of words =5*5*5=625
http://www.tutorvista.com/search/permutaion-and-combination?cpid=50707&sa=1
If we can not repeat the letter then the number of words=5*4*3=60
because we have to fill three ( _ _ _ ) space with the help of these 5 letters
We can fill first space by all the 5 letters
and next space we can fill by rest 4 letters
and next space we can fill by rest 3 letters
so total number of words =5*4*3=60

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Gem,Tex,teg,get,met,meg. (Tex is a name, but it's still a word.)

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We think the answer is 3 to the 5 th power or 125
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O, u r talking about math! Missed that completely. I am a Scrabble Ace. Don't do math( unless it's money).
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I'm assuming that since you said combinations then you dont mean actual words, just different letter combinations. Here are a few:
gme, gmt, gmx, mge, meg, mtg, mxg, mxt, mxe, mtx, etx, tex, tgx, xgm, xmg, xte, xet, xgt.
There are plenty more.