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A and B are in the ratio of 5: 4 , B and C in the ratio of 3 : 2. What is the ratio of A : C ?
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The ratio of boys to girls in class A is 3 to 4 . The ratio of boys to girls in class B is 4 to 5 . If the two classes were combined, the ratio of boys to girls in class B is two less than the number of girls in class A. How many girls are in class A?