the average of 10 numbers was calculated as 20 . it is discovered later on that while calculating the average , one number , namely 86 , was incorrectly read as 26 . what is the correct average ?
"10 * 20 - 26 + 86 = 260 260 / 10 = 26 the answer is e ."
divide(add(multiply(10, 20), subtract(86, 26)), 10)