Respuesta :
18 * (8th grade populaton)/ (Total population)
18 * (650 / (650 + 520) )
18 * (650 / 1170)
11700 / 1170 = 10
18 * (650 / (650 + 520) )
18 * (650 / 1170)
11700 / 1170 = 10