The mean of 50 observations was 36

The mean of 50 observations was 36. It was found later that an observation 30 was wrongly taken as 23. 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 #18765