Using the continuity of probability, we define the probability of a coherent problem of the infinite Bernoulli trial and we use a relatively simple method but which can be applied in general occasion to get calculation formula of the probability.

• 摘要利用概率的下连续性，我们定义了无穷伯努利试验中一个连贯问题的概率，进而我们用一个比较简单但在一般场合也可以应用的方法导出了这个概率的计算公式。