每一枚加农炮命中的概率是60%
那么,N枚都不命中的概率是(0.4)ⁿ
所以,N枚至少命中一枚能达到99%的概率是：1-(0.4)ⁿ
代值,6,7能达到99%的概率
打字不易,
The height of a right circular cylinder is increased by p pe
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