Average of 3.39, 3.33, 2.78, 3.05, 3.08, 3.13

To find the average of these numbers, you need to add them together and then divide the result by the total number of numbers.

3.39 + 3.33 + 2.78 + 3.05 + 3.08 + 3.13 = 18.76

Now divide this sum by 6 (the total number of numbers):

18.76 / 6 = 3.12666666667

Rounded to two decimal places, the average is approximately 3.13.