A cab driver 5 days income was $600, $250, $450, $400 , $800. Then his average income is? Answers:  A) $ 460  B) $ 480  C) $ 500  D) $ 520  E) $ 540

Rationale: "avg = sum of observations / number of observations avg income = ( 600 + 250 + 450 + 400 + 800 ) / 5 = 500 answer is c"
Answer: C