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MATH / Using the letters A and B, the following two-letter code words can be formed: AA, AB, BB, BA. Using the letters A, B, and C, how many different three-letter code words can be forme…

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problem

Using the letters AA and BB, the following two-letter code words can be formed: AAAA, ABAB, BBBB, BABA. Using the letters AA, BB, and CC, how many different three-letter code words can be formed?
Plain-text mathematical notation (without MathML)
Using the letters A and B, the following two-letter code words can be formed: AA, AB, BB, BA. Using the letters A, B, and C, how many different three-letter code words can be formed?
Original LaTeX notation
Using the letters $A$ and $B$, the following two-letter code words can be formed: $AA$, $AB$, $BB$, $BA$. Using the letters $A$, $B$, and $C$, how many different three-letter code words can be formed?

level

Level 5

type

Prealgebra

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