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Mathematics 7 Online
OpenStudy (anonymous):

In a certain group at NBHS, 3/7 of the students are boys and the ratio of the students older than or equal to 15 years old to the students less than 15 years old is 3:8. If 3/4 of the girls are less than 15 years old, then what fraction of the boys are less than 15 years old?

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