rubaidi

You're really super genius

You are genius, could please upload your diagram again because I can't display picture.

Excellent try, this formula can be used only EXACTLY number of FV ONLY , EXACTLY number of FB ONLY and EXACTLY number of VB ONLY. Yes, that's right.

There are 90 students at school, 30 students participate at football team, 40 students participate at Volleyball team and 25 students participate at Basketball team. 15 students are participating in football team & Volleyball team. 10 Students are participating in football team & Basketball team. 8 Students are participating in Volleyball team & Basketball team. 23 Students not participating at any team, whereas there are students participate at three teams. How many students participating at three teams? How many students participating at Football team only? How many students participating at Volleyball team only? How many students participating at Basketball team only?