the average of 10 numbers was calculated as 17 . it is discovered later on that while calculating the average , one number , namely 56 , was incorrectly read as 26 . what is the correct average ?
10 * 17 - 26 + 56 = 200 200 / 10 = 20 the answer is b .
divide(add(multiply(10, 17), subtract(56, 26)), 10)