There are 15 boys in a group of 35 students. What is the ratio of boys to girls in this group?

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The number of boys in the group is 15 and there are 35 students. This gives the number of girls as 35 - 15 = 20

The ratio of the number of boys to the number of girls is 15:20 = 3:4.

The required ratio of the number of boys to the number of girls is 3:4.

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