Dacid obtained 91, 65, 82, 67 and 85 marks (out of 100) in English, Mathematics, Physics, Chemistry and Biology. What are his average marks?
Choose the most appropriate option
A) 29  B) 78  C) 39  D) 37  E) 75

Rationale: "average = ( 91 + 65 + 82 + 67 + 85 ) / 5 = 78 answer : b"
Answer: B