How are these numbers calculated?

Big Games

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

If winner is:HomeDrawAway
Week of 9/20100.0*Chance in playoffs100.0*Average seed
France vs Argentina+18.5+2.1-18.6
+2.6-0.1-2.6
England vs Tonga+0.0-1.4+0.0
+0.0-0.2+0.0
England vs United States+0.0-1.4+0.0
+0.0-0.2+0.0
Japan vs Russia+0.0-0.0-0.1
Russia vs Samoa-0.0+0.1-0.0
Ireland vs Scotland-0.0+0.1-0.0
Australia vs Fiji-0.0+0.1-0.0
New Zealand vs South Africa-0.0+0.1-0.0
Italy vs Namibia-0.0+0.1-0.0
Italy vs Canada-0.0+0.1-0.0
Wales vs Georgia-0.0+0.1-0.0
Fiji vs Uruguay-0.0+0.1-0.0
If winner is:HomeDrawAway
Week of 9/28100.0*Chance in playoffs100.0*Average seed
France vs United States+18.5+2.1-18.6
+2.6-0.1-2.6
Argentina vs Tonga+0.0-1.4+0.0
+0.0-0.2+0.0
Japan vs Ireland+0.0-0.0-0.1
Ireland vs Russia-0.0+0.1-0.0
Scotland vs Samoa-0.0+0.1-0.0
New Zealand vs Canada-0.0+0.1-0.0
Australia vs Wales-0.0+0.1-0.0
Georgia vs Fiji-0.0+0.1-0.0
South Africa vs Namibia-0.0+0.1-0.0
Georgia vs Uruguay-0.0+0.1-0.0

What If

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

100100100100100100100100100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-OTLDplayoffs1234567891011121314151617181920Count
164-000In52351211,678,970,668
143-001In1444338000169,639,347
123-01097.1%210192220157230006,702,147,750
2-002100.0192127221451006,436,861
102-01179.7000212272811182000508,871,309
1-00385.10041529271013200108,712
82-02025.00000138121315141311620000010,053,129,641
1-01219.7000261210151817126200012,880,729
0-00412.7157315272611500685
61-0210.000002924332381000508,913,951
0-0130.400018253422710108,994
41-030Out000139151820181246,702,221,593
0-022Out000151629281746,439,022
20-031Out0006264425169,609,105
00-040Out1931591,679,019,233
Total:40.0%4555555565555555555528,198,497,600
Points
Chance Will Make Playoffs