The average of five numbers id 28

The average of five numbers id 28. If one number is excluded, the average becomes 25. What is the excluded number?

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 #70919