The average of all odd numbers from 113 to 159 is . . . . . . . .

Answer: Option D

Average of all odd numbers from 113 to 159, by using Arithmetic progression formula,
$$\begin{array}{rl}& \text{Average}=\frac{\frac{n}{2}\left[a+l\right]}{n}\\ & =\frac{1}{2}\left[a+l\right]\\ & =\frac{1}{2}\times \left[113+159\right]\\ & =\frac{272}{2}\\ & =136\end{array}$$