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1问题的引入有这样一个问题:一名工人要看管三台机床,在一小时内机床不需要工人照顾的概率对于第一台是0.9,第二台是0.8,第三台是0.85求在一小时内机
1 The introduction of the problem has such a problem: a worker needs to look after three machine tools. The probability that the machine tool does not require worker care in one hour is 0.9 for the first, 0.8 for the second, and 0.85 for the third. Hour machine