4. Two mark example problems III

In a group of \(100\) students, \(85\) students speak Tamil, \(40\) students speak English, \(20\) students speak French, \(32\) speak Tamil and English, \(13\) speak English and French and \(10\) speak Tamil and French. If each student knows atleast any one of these languages, then find the number of students who speak all these three languages.