🧵 Gacha probability question

Anonymous at Thu, 10 Oct 2024 02:26:28 UTC No. 16418509

I only have less than an hour to decide, how can I tell my chances:
Playing a gacha which has 4 URs, you do 60 pulls at a time. So I've done it 5 times, got nothing for the first three 60 pulls. Then I got 2 of the URs on the fourth, and 1 UR on the fifth. All different. Still missing the last UR, what are the chances I get it if I do a 6th 60 pull?
Rates are 0.245% per UR, and dupes are possible.