In a class of 350 students, 80 students drink both tea and coffee, while 170 students drink coffee. If 50 students don't drink either tea or coffee, find the number of students who drink tea.

Given that there are 350 students in the class and 50 students don't have either drink.

So, 300 students have either tea or coffee or both.

Given 80 students drink both tea and coffee, while 170 students drink coffee

So, the number of students who drink only coffee is 170-80 = 90.

Assuming that the number of students who drink only tea is $$x$$.

So, $$x+80+90=300$$

or, $$x=130$$

Hence, the number of students who drink tea = only tea + both tea and coffee = 130 + 80 = 210

Hence, the answer is 210.