IF the probability for each cannon shoots the target is 60%,
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IF the probability for each cannon shoots the target is 60%,which of the following numbers of cannons -can reach the probability at 99%?-3 -4 -5 -6 -7 why?
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
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
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