Question
The ratio of the boys to the girls in a school was 7 : 4. After 25 boys went home and 20 new girls came, there were 6 more boys than girls in the end. Find the number of students in the school at first.
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The ratio of the boys to the girls in a school was 7 : 4. After 25 boys went home and 20 new girls came, there were 6 more boys than girls in the end. Find the number of students in the school at first.