There must be 5 rows for each row of girl to have only girls
The given parameters are:
[tex]Girls = 25[/tex]
[tex]Boys = 20[/tex]
To calculate the number of rows where each row has only girls, then we first calculate the ratio of boys to girls:
[tex]Ratio = Boys : Girls[/tex]
[tex]Boys : Girls = 20 : 25[/tex]
Divide by 5
[tex]Boys : Girls = 4 : 5[/tex]
Rewrite as:
[tex]Boys \to 4[/tex]
[tex]Girls \to 5[/tex]
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:
[tex]Rows = \frac{Total\ Girls}{Girl\ Ratio}[/tex]
[tex]Rows = \frac{25}{5}[/tex]
[tex]Total = 5[/tex]
Hence, there must be 5 rows for each row of girl to have only girls
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