Altaria1 Posted July 24, 2020 Share Posted July 24, 2020 于2020/7/19 PM6点19分,sumao 说: 一个三万面的骰子,每次遇怪投一次 虽然闪率是1/30000,但是我认为30000只里面不一定有1只闪光 Link to comment
sumao Posted July 24, 2020 Share Posted July 24, 2020 1小时前,Altaria1 说: 虽然闪率是1/30000,但是我认为30000只里面不一定有1只闪光 30000面的骰子你投30000次就能中? Link to comment
BlueNose Posted July 24, 2020 Author Share Posted July 24, 2020 5分钟前,sumao 说: 30000面的骰子你投30000次就能中? 你说的三万面骰子的情况符合闪光概率三万分之一。 他说的也是对的,丢硬币每次50%概率正面,丢两次硬币不一定就一定出现至少一次正面,还有两次反面的情况,只能说期望值(平均值)是1,三万分之一的概率实验三万次发生至少一次的概率约为64%。 不过显然他回复你的属于答非所问。。 我没回复你那条的原因是实际情况不太可能是三万面骰子这种情况作为闪光机制。 Link to comment
pkqxiaozhi Posted July 24, 2021 Share Posted July 24, 2021 (edited) Edited July 27, 2021 by pkqxiaozhi Link to comment
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