In the class of 50 students, 30 speak Tamil and 40 speak…

In the class of 50 students, 30 speak Tamil and 40 speak Telugu. What is the lowest possible number of students who speak both the languages?

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #1243