The average of 25 results is 24

The average of 25 results is 24. The average of first 12 of those is 14 and the average of last 12 is 17. What is the 13th result?

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #40621