In a certain class, 40\(\%\) of the students take coffee, 40\(\%\) take tea, 50\(\%\) take milk, and 10\(\%\) take all the three. Also, 20\(\%\) take coffee and tea, 20\(\%\) take tea and milk, and 20\(\%\) take coffee and milk. 10 students do not take any of the three. How many students are there in the class?