Problem: reeya obtained 40 , 60 , 70 , 80 and 80 out of 100 in different subjects , what will be the average
Rationale: "explanation : ( 40 + 60 + 70 + 80 + 80 / 5 ) = 66 option a"
annotated_formula: divide(add(add(add(add(40, 60), 70), 80), 80), add(const_4, const_1))