A cab driver 5 days income was $200, $150, $750, $400 , $500. Then his average income is?	Choose the correct choice from the following answers:
A) $ 420	B) $ 410	C) $ 400	D) $ 390	E) $ 380

Rationale: "avg = sum of observations / number of observations avg income = ( 200 + 150 + 750 + 400 + 500 ) / 5 = 400 answer is c"
Answer: C