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There are some students in an auditorium...

There are some students in an auditorium, some of them are dressed in white and the others are drcssed in bluc. The ratio of the number of boys dressed in white to the number of girls dressed in blue is `4 : 3` and the ratio of the total number of girls dressed in white to the number of boys dressed in blue is ` 4 : 5`. The ratio of the total number of boys and girls dressed in white to the total number of boys and girls dressed in blue is ` 12 : 13`. Find the ratio of the total number of boys to that of girls in the auditorium.

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