SOLUTION: the ratio of boys to girls in history class is 4 to 5. How many girls are in the class if there ar 12 boys in the class? explain

Question 539499: the ratio of boys to girls in history class is 4 to 5. How many girls are in the class if there ar 12 boys in the class? explain
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
the ratio of boys to girls in history class is 4 to 5. How many girls are in the class if there ar 12 boys in the class? explain
----------
4 to 5 is the same as 4x to 5x
where
# of boys = 4x
and
# of girls = 5x
-------------------
4x = 12
x = 3
---
# of girls = 5x = 5*3 = 15
------------------------------
Cheers,
Stan H.
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