Answer: See below
Step-by-step explanation:
Given:
The letters FGHIJKL
To find:
The number of three letter words can be formed if repetition is allowed (or) if repetition is not allowed
[tex]$(a) If repetition is allowed:Total no of three letter words can be made$=7_{C 1} x 7_{C 1} x 7_{C 1}=7^{3}=343$(b) If repetitions is not allowed :Total no of three letter words can be made without repetition is $\begin{gathered}=7_{C 1} \times 6_{C 1} \times 5_{C 1} \\=7 x 6 \times 5=210\end{gathered}$[/tex]
