How are these numbers calculated?

Big Games

How we did yesterday and who we should root for today.   Explain

Friday100.0*Average seed
Trumbull 54 Darien 19 -0.0
Saturday100.0*Average seed
Darien 39 Bassick 35 +0.9
Monday100.0*Average seed
Norwalk 41 Darien 37 -0.5
Games Above .500
Chance Will Win Championship