Here's how to answer in Spanish, depending on the situation:
If there are students from Mexico:
* Sí, hay estudiantes de México en la clase. (Yes, there are students from Mexico in the class.)
* Sí, hay algunos estudiantes de México. (Yes, there are some students from Mexico.)
* Sí, hay varios estudiantes de México. (Yes, there are several students from Mexico.)
If there are no students from Mexico:
* No, no hay estudiantes de México en la clase. (No, there are no students from Mexico in the class.)
To be polite, you can also add:
* ¿Te refieres a la clase de...? (Are you referring to the class of...?) - This helps clarify which class you're discussing.
* ¿Y tú eres de México? (And are you from Mexico?) - This can lead to a conversation and make the student feel more comfortable.
Remember to be respectful and welcoming to all students in the class, regardless of their nationality.