Well, 22.10+13+45+25.10+17.20+1910 gives you 2032.4.
To find the average, you divide the sum by the amount of numbers (in this case, 6), and you'll get the average. For all these numbers, the average is 338. 73, the decimal is repeating.
So, the answer is 338.73, repeating.
Hope you got what you needed!
:)
