Respuesta :

soccer 25%
baseball + football = 100 - 25 = 75%
so baseball = football = 75/2 = 37.5%

so 37.5% x 48 = 18 
soccer 25% x 48 = 12

answer
soccer = 25% = 12 classmates
baseball = 37.5% = 18 classmates
football = 37.5% = 18 classmates