Respuesta :

Answer:

1 : 30

Step-by-step explanation:

ratio of buses : students = 70 : 2100 ( divide both parts by 70 )

buses : students = 1 : 30

Answer:

1 : 30

Step-by-step explanation:

Buses : Students

= 70 : 2100

= 70 : 70 x 30

= 1 : 30