Homework Help: Math

Posted by Nat on Sunday, October 30, 2011 at 9:15pm.

Using the ordinary alphabet and allowing repeated letters, find the number of words of length 8 that begin and end with T.

Math - Steve, Monday, October 31, 2011 at 11:55am
If any combination of letters counts as a word, then there are 26 ways to choose each of the six letters between the two t's.

So, there are 26^6 = 308915776 ways to make 8-letter words

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