There must be 5 rows for each row of girl to have only girls
The given parameters are:


To calculate the number of rows where each row has only girls, then we first calculate the ratio of boys to girls:


Divide by 5

Rewrite as:


This means that there are 4 boys on each row for the boy rows
And there are 5 girls on each row for the girl rows
The number of row is then calculated as:



Hence, there must be 5 rows for each row of girl to have only girls
Learn more at:
brainly.com/question/13032065