蒐集轉蛋 - 拼圖
![Hazel avatar](/img/woman-ring.jpg)
By Hazel
at 2020-02-14T16:47
at 2020-02-14T16:47
Table of Contents
轉蛋一次 100 元
總共有五種不同類型 (機率都相同)
要蒐集到所有種類
期望值需要花多少錢?
--
總共有五種不同類型 (機率都相同)
要蒐集到所有種類
期望值需要花多少錢?
--
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拼圖
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