There are 26 letters to choose from for the first letter; 26 for the second letter; 26 for the third letter; and 1 for the last letter (it must be the same as the first letter). This gives us
We would find the mean. So: 15 + 12 + 17 + 13 + 20 + 19 = 96 Divide the sum by the amount of numbers added together. So: 96/ 16 The mean or average is 16
