Answer:
The number of selections of collars that are possible if repetition of colors are not allowed is;

Step-by-step explanation:
Given that Paul wants to buy a new collar for each of his 3 dogs.
And The collars come in a choice of 8 different colors.
The number of ways of selections of collars without repetition can be written as;


Therefore, the number of selections of collars that are possible if repetition of colors are not allowed is;
