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Mathematics, 06.12.2019 20:31 lashaunahard

How many strings of 4 lower case english letters are possible that have the letter "t" in them somewhere? here strings may use the same letter more than once. (hint: it might be easier to first count the strings that don't have a "t" in them.)

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How many strings of 4 lower case english letters are possible that have the letter "t" in them somew...
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