It means "How many students are there?"
Sí, hay estudiantes de México en la clase.
Hay veinte estudiantes en la clase de español.
It means "How many students are there?"
hay veinte estudiantes.
"(Ustedes) son estudiantes" (Vosotros, as) sois estudiantes
The question is asking: How many students are there in the spanish class? So lets say there are 15 students in the class, you would reply with: There are 15 students in the spanish class. "Hay quince estudiantes en la clase de español." You can replace quince with any number.
How many students are in the Spanish class
The question means: How many teachers are there in the Spanish class? The answer would be: Hay uno (1)/dos (2)/tres (3)/cuatro (4)/cinco (5) (according to the number of teachers) profesores.
Estudiantes F.C. was created in 2007.
Estudiantes F.C. ended in 2008.
CFF Estudiantes ended in 2006.
CB Estudiantes was created in 1948.