All Tormented Bosses have 5 chances to drop a mythic at 1.5% chance each. In total, a 7.5% chance to drop a Mythic Unique. The resulting effect of this change is that the bosses have a chance to drop multiple Mythic Uniques instead of just 1.
That’s not correct. You cannot just multiply the drop chance with the amount of items. That would mean with 5 Items and a 20% drop chance a Mythic would be guranteed.
Or that you will have a guarateed 6 when rolling 6 dices.
Correct is:
1-(the chance to drop NO mythic) =
1-(Chance that no unique drops^amount of items) =
1-(0,985^5) = 7,28%
And that is the chance for ONE run.
If you do 10 runs you have to sum up the items. For 10 runs that would be 50.
→ Chance for at least one Mythic in 10 runs is 1-(0,985^50) = 53%