dacid obtained 70 , 63 , 80 , 63 and 65 marks ( out of 100 ) in english , mathematics , physics , chemistry and biology . what are his average marks ?
"average = ( 70 + 63 + 80 + 63 + 65 ) / 5 = 341 / 5 = 68.2 . answer : e"
divide(add(add(add(add(70, 63), 80), 63), 65), divide(const_10, const_2))