12, 10, x, 8 The median of the list of positive integers…

12, 10, x, 8 The median of the list of positive integers above is 9. Which of the following could be the average (arithmetic mean) of the list?

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 #49659