How are these numbers calculated?

Big Games

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

Friday100.0*Average seed
St. Joseph 65 Greenwich 40 -0.2
Trumbull 54 Darien 19 +0.2
New Canaan 42 Danbury 62 +0.1
Saturday100.0*Average seed
Darien 39 Bassick 35 -0.2
MondayNone
Games Above .500
Chance Will Win Championship