Question 678921: If 40% of a school are boys, and 30% of students have blond hair, and there are three times as much of girl as boys to have blond hair. What is the percentage of blonde hair boys?
Answer by ankor@dixie-net.com(22740)   (Show Source):
You can put this solution on YOUR website! If 40% of a school are boys, and 30% of students have blond hair, and there are three times as much of girl as boys to have blond hair.
What is the percentage of the class is blonde hair boys?
:
Let's say we have 120 students
then
.4(120) = 48boys
and
.6(120) = 72 girls
then
.30(120) = 36 kids have blond hair
:
It says, "three times as much of girl as boys to have blond hair."
A ratio of 3:1, 27 girls have blond hair and 9 boys
:
Find the per cent boys: 9/120 * 100 = 7.5% of class has blonde boys
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