How are these numbers calculated?

Big Games

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

Friday, 3/4100.0*Average seed
Columbia 66 Brown 63 -0.4
Dartmouth 72 Penn 64 -0.2
Cornell 64 Yale 88 +0.1
If winner is:HomeAway
Saturday, 3/5100.0*Average seed
Cornell vs Brown-0.4+0.4
Dartmouth vs Princeton-0.1+0.1

What If

Chances based on how well the Brown finish out the regular season.   Explain

100100100100100100100100
If finish:ChanceChance will finish season at seed
TWW-Lwins title12345678Count
41-0No25751,340,404,222
30-1No50501,340,372,866
Total:No1262252,680,777,088
Games Above .500
Chance Will Win Championship