The mean of 20 observations was 36

The mean of 20 observations was 36. It was found later that an observation 25 was wrongly taken as 40. The corrected new mean is

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 #30203