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2/3 of a class is girls. What is the ratio of boys to girls?

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I'll try your quiz. The ratio of boys to girls would be 1:2. In your premise 2/3 of a class is girls. If there were 3 students, then there would be 2 girls and 1 boy. This would yield the ratio previously described. read more

The number of girls in class is 4. This can be found out following way: Let the number of boys be 3x and girls be 2x. Thus, total number of students in class will be 5x. Now, if two girls are added, then it would be: 2(2x+2) = 5x+2; 4x+4 = 5x+2; which makes, x = 2; Thus, the number of girls comes out currently to be 2x, that is, 4. read more