math

How many 3 letter arrangements can you make while making the first and the third letter one of the 21 constants and the middle letter one of the 5 vowels {a,e,i,o,u} . {two such arrangments to use are KOM and XAX?

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asked by chidora
  1. From your example I can see that repetition is allowed so
    21*5*21 = ...

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    posted by Reiny

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