basis In the ancient training school of Dronacharya, The Kauravas, the Pandavas and some of their friends, a total of 220 trainees are getting trained in Archery, Horse Riding and Sword fighting. Each trainee is undergoing training for at least one out of the three skills. Some are undergoing training for more than one of the three skills. Additionally, the following information is known: (i) In all 93 trainees are not undergoing training for Archery. (ii) In all 91 trainees are not undergoing training for Horse Riding. (iii) In all 108 are not undergoing training for Sword Fighting. (iv) In all 45 trainees are undergoing training in Sword Fighting and at least one more discipline. (v) In all 52 trainees are undergoing training in Horse Riding and at least one more discipline. (vi) In all 68 trainees are undergoing training in Archery and at least one more discipline. 33 How many trainees are undergoing training for all the three skills?