what is the average ( arithmetic mean ) of 10 , 20,30 , 40,50 , 60,70 , 80,90 ?
"so addition of all term - 10 , 20 , 30 , . . . . . . . 90 so average = ( 10 + 20 + 30 + 40 + 50 + 60 + 70 + 80 + 90 ) / 9 = ( 450 ) / 9 = 50 hence , the correct answer is e ."
divide(divide(multiply(add(10, 40,50), add(divide(subtract(40,50, 10), 20,30), const_1)), const_2), add(divide(subtract(40,50, 10), 10), const_1))