Discussion between Teacher and Students

A teacher uses a text and some pictures of fruits and vegetables and holds a discussion with her students. The students link the details with their previous knowledge and learn the concept of nutrition. This approach is based on

After a classroom discussion, teacher should do except

In the given figure 10% are students and parents and the 10% are students, teachers and parents, 15% are teachers and parents, 35% are students and teachers, How many percentage are only teachers, parents and students?