[잡담] 최초 25배 이후 10배 획득확률 계산표

N (주당 시도수)실패확률 (4주간)당첨확률

1	0.754=0.3160.75^4 = 0.3160.754=0.316	68.4%
2	(0.75⋅0.9)4≈0.205(0.75 cdot 0.9)^4 ≈ 0.205(0.75⋅0.9)4≈0.205	79.5%
3	(0.75⋅0.92)4≈0.133(0.75 cdot 0.9^2)^4 ≈ 0.133(0.75⋅0.92)4≈0.133	86.7%
4	(0.75⋅0.93)4≈0.087(0.75 cdot 0.9^3)^4 ≈ 0.087(0.75⋅0.93)4≈0.087	91.3%
5	(0.75⋅0.94)4≈0.057(0.75 cdot 0.9^4)^4 ≈ 0.057(0.75⋅0.94)4≈0.057	94.3%
6	(0.75⋅0.95)4≈0.038(0.75 cdot 0.9^5)^4 ≈ 0.038(0.75⋅0.95)4≈0.038	96.2%
7	(0.75⋅0.96)4≈0.025(0.75 cdot 0.9^6)^4 ≈ 0.025(0.75⋅0.96)4≈0.025	97.5%
8	(0.75⋅0.97)4≈0.016(0.75 cdot 0.9^7)^4 ≈ 0.016(0.75⋅0.97)4≈0.016	98.4%
9	(0.75⋅0.98)4≈0.0105(0.75 cdot 0.9^8)^4 ≈ 0.0105(0.75⋅0.98)4≈0.0105	98.95%
10	(0.75⋅0.99)4≈0.007(0.75 cdot 0.9^9)^4 ≈ 0.007(0.75⋅0.99)4≈0.007	99.3%

- 4주간 캐릭터 N개로 탈것 등 작업했을 때 획득 확률(By GPT)

99%로 반드시 먹겠다 = 매주 10캐릭

95%면 거의 먹은거지 = 매주 5캐릭

70%정도면 충분하지! = 매주 1캐릭 (최초 25배 보너스만 받기)