Answer:
y=[tex]3^{n}[/tex]
Step-by-step explanation:
There are three letters A, B, C in order to make the tags and y is the number of tags that can be made using n spaces. So, there are three choices for the first letter A and three choices for the remaining two letters that are B and C respectively.
By the basic counting principle,
Formulae for the number of tags they can make using n spaces is: 3×3×3×3×..........×3( n times)
=[tex]3^{n}[/tex]
Therefore, y=[tex]3^{n}[/tex]
