Question

A class contains 13 boys and 17 girls. of the girls, 25% have blond hair. what percentage of the class are blonds

Answer 1

For this case, we first look for the number of blonde girls.
 We have then:
 $(25/100) * (17) = 4.25$
 We are now looking for the percentage of the class with blonde hair.
 For this, we make the following rule of three:
 30 --------------> 100%
 4.25 -----------> x
 From here, we clear the value of x.
 We have then:
 $x = (4.25 / 30) * (100) x = 14.2%$
 Answer:
 14.2% of the class are blonds

Answer 2

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.

$\frac{25}{100}\cdot 17=0.25\cdot 17=4.25$

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:

$\frac{x}{100}\cdot 30=4.25$

Now, let us solve for x.

$\frac{x}{100}\cdot 30\cdot \frac{100}{30}=4.25\cdot \frac{100}{30}$

$x=\frac{425}{30}$

$x=14.166$

$x\approx 14.2$

Therefore, 14.2 percentage of the class are blonds.