Dacid obtained 51, 65, 82, 67 and 85 marks (out of 100) in English, Mathematics, Physics, Chemistry and Biology. What are his average marks?  Choose the correct choice from the following.
A) 29 B) 38 C) 39 D) 70 E) 75

Rationale: "average = ( 51 + 65 + 82 + 67 + 85 ) / 5 = 70 answer : d"
Answer: D