Since there’s usually the poll asking about gold covers people pull from the 4k point (and season placement) 10-packs, I thought I’d put the expected distribution here:
Updated for Season XVI increases:
0 gold covers: 2.11%
1 gold: 9.95%
2 gold: 21.07%
3 gold: 26.44%
4 gold: 21.77%
5 gold: 12.29%
6 gold: 4.82%
7 gold: 1.30%
8 gold: 0.23%
9 gold: 0.02%
10 gold: <0.01%
The chances of multiple 4* characters have improved, but not much. None is still the most likely outcome (70%, down from 76%). 26% chance of one 4* character; 4% chance of two, and <0.5% chance of more than two.
Prior to Season XIV:
0 gold covers: 10.34%
1 gold: 26.34%
2 gold: 30.19%
3 gold: 30.51%
4 gold: 9.15%
5 gold: 2.79%
6 gold: 0.59%
7 gold: 0.09%
8 gold: 0.01%
9 gold: <0.01%
10 gold: <0.01%
There was a pretty big boost to the 10-pack odds beginning for season 14. 10-pack awards with no gold covers shouldn’t quite be a thing of the past, but those who are good enough to score multiples shouldn’t have multiple strikeouts.
Seasons XIV-XV:
[spoiler]0 gold: 2.55%
1 gold: 11.32%
2 gold: 22.65%
3 gold: 26.65%
4 gold: 20.66%
5 gold: 10.98%
6 gold: 4.05%
7 gold: 1.03%
8 gold: 0.17%
9 gold: 0.02%
10 gold: <0.01%
After pulling a Goddess of Thunder token in a sub reward yesterday, I got curious and ran one separate set of math on the current Heroic 10-packs, showing the expected distribution of 4* covers only. The most likely outcome is no 4* covers (76%), followed by one 4* cover (21%), then two (2.6%). Because I’m truncating a bit, the odds of three or more 4* covers in a 10-pack are essentially negligible.[/spoiler]
Update 6/15/2015: Adjusted odds to account for addition of Bullseye (Classic) & Vision to Heroic tokens. Also prepped separate note regarding expected distribution of 4* covers (which is a subset of the 3/4* table).
The May/June Q&A video indicated that the odds of pulling a 4* cover in a token will increase at some point in the near future. As soon as I notice that’s live, I’ll update the math and repost here.
Update, 6/29/2015: The increase in 4* odds for Season XVI has gone into effect. Ice_IX has noted elsewhere that instead of rounding up to 0.3%, it’s now rounding down to 0.3%, so I’m pretty sure my numbers are such that I shouldn’t be reporting two decimal places. However, having started like that for the earlier runs, I’m going to stick with it.