Respuesta :
28/4 = 7 students to guidance office/ 21 left
21/3 = 7 to nurse/ 14 left
14/2 = 7 to library/ 7 left
7 students left in the classroom
21/3 = 7 to nurse/ 14 left
14/2 = 7 to library/ 7 left
7 students left in the classroom