A cab driver 5days income was …250, …400 , $500

A cab driver 5days income was $400, $250, $650, $400 , $500. Then his average income 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 #22443