Average is defined as the total sum of all the objects divided by the number of objects.
So, here we have been given two base lengths of trapezoids.
The given lengths are = 16.8 yards and 6.9 yards.
The sum of the bases is = [tex]16.8+6.9[/tex] = 23.70 yards
Hence, average will be = [tex]\frac{23.70}{2}= 11.85[/tex] yards.
So, the answer is 11.85 yards.
