in a class of 30 students in an examination in maths 3 students scored 95 marks each , 3 get zero each and the average of the rest was 45 . what is the average of the whole class ?
"explanation : total marks obtained by a class of 25 students = 3 * 95 + 3 * 0 + 26 * 45 = 1455 average marks of whole class = 1455 / 30 = 48.5 answer : option d"
divide(add(multiply(45, subtract(30, add(3, 3))), multiply(95, 3)), 30)