2025 Fermat Problem 8

The average of 15 integers is 18. The average of 5 of these integers is 12. What is the average of the other 10 integers?

\textbf{(A)}\ 15\quad \textbf{(B)}\ 21\quad \textbf{(C)}\ 24\quad \textbf{(D)}\ 18\quad \textbf{(E)}\ 12

If there are no answer choices shown, enter a numerical answer.

Full credit to this problem is given to the CEMC, you may view all Fermat contests here.