calculate the average of all the numbers between 11 and 27 which are divisible by 2 .
"explanation : numbers divisible by 2 are 12,14 , 16,18 , 20,22 , 24,26 , average = ( 12 + 14 + 16 + 18 + 20 + 22 + 24 + 26 , ) / 8 = 152 / 8 = 19 answer : d"
multiply(divide(add(add(floor(divide(11, 2)), const_1), floor(divide(27, 2))), const_2), 2)