SOLUTION: The ratio of boys to girls in a class is 11 to 7. The difference between the number of boys and girls is 12. How many students are in the class?

Question 252694: The ratio of boys to girls in a class is 11 to 7. The difference between the number of boys and girls is 12. How many students are in the class?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
The ratio of boys to girls in a class is 11 to 7. The difference between the number of boys and girls is 12. How many students are in the class?
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b - g = 12 --> b = g + 12
11:b::7:g
11g = 7b
11g = 7(g+12)
11g = 7g+84
g = 21
b = 33
Total = 54

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