The average is the sum of the numbers divided by the number of numbers:
If the odd numbers are 1, 3,
5, 7 and 9 the answer will be:
![(1+3+5+7+9)/(5)](https://img.qammunity.org/2019/formulas/mathematics/middle-school/sil5ee100ymfaadxq0uvmzprikqp00o42d.png)
5 - 3rd number of the sequence.
The general answer (if using consecutive odd numbers) will always be the 3rd number of your sequence.
Hope it helped,
Happy homework/ study/ exam!