Answers

2015-07-03T12:49:54+05:30
When there were 1260 students then there were 756 boys and 504 girls. and when there were 1440 students (1260 + 180) then there were 840 boys and 600 girls
                                                   840
                                                 - 756
                                                ______
                                                   84
                                                ______

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