Answer :
Girls = 20
Boys = 15
You can get this by setting the number of girls equal to x and the number of boys equal to 3/4x. Then add the two together, set equal to 35 and solve for x.
Boys = 15
You can get this by setting the number of girls equal to x and the number of boys equal to 3/4x. Then add the two together, set equal to 35 and solve for x.