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

Solution (By Examveda Team)

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