Answer:
14.2% of the class are blonds.
Step-by-step explanation:
We have been given that a class contains 13 boys and 17 girls. of the girls, 25% have blond hair.
First of all, we will find 25% of 17.
[tex]\frac{25}{100}\cdot 17=0.25\cdot 17=4.25[/tex]
Now, we will find 4.25 is what percent of total students (13+17=30).
Let 4.25 be x percent of 30. We can represent this information in an equation as:
[tex]\frac{x}{100}\cdot 30=4.25[/tex]
Now, let us solve for x.
[tex]\frac{x}{100}\cdot 30\cdot \frac{100}{30}=4.25\cdot \frac{100}{30}[/tex]
[tex]x=\frac{425}{30}[/tex]
[tex]x=14.166[/tex]
[tex]x\approx 14.2[/tex]
Therefore, 14.2 percentage of the class are blonds.
