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?
-----------------
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