We have a total of 36 members, of which 10 are males.
Then, we can calculate the number of females as:
![\begin{gathered} m+f=36 \\ f=36-m=36-10=26 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/high-school/9uz7d23te615g72v2xt4pdph03i2ot09ox.png)
We can calculate the ratio of females to males as:
![(f)/(m)=(26)/(10)=(13)/(5)](https://img.qammunity.org/2023/formulas/mathematics/high-school/otnmt08catqjw8pkbsjvdlcaefs4n2wv0c.png)
The ratio of females to males is 13:5, meaning that there are 13 females per each group of 5 men.
Answer: 13:5.