<span>To calculate the average; add up all the numbers, then divide by how many numbers there are. In this case, there are 5 numbers; personal, small, medium, large, and extra large.
</span>8 + 10 + 12 + 14 + 16 / 5 --> 60/5 = 12
I'm not sure if I understood this problem, but I'd say y= 2
Just divide 392/87 and you get 4.505