How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 2/6100.0*Average seed
Frisch 44 SAR 34 +0.4
Flatbush 14 Ramaz 32 -0.2
Bruriah 31 Maayanot 41 -0.0
If winner is:HomeAway
Week of 2/20100.0*Average seed
Maayanot vs Frisch-1.2+0.8

What If

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

100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456Count
91-0In10023,744,125
80-1In10016,747,307
Total:In594140,491,432
Games Above .500
Chance Will Make Playoffs