在一次概率的习题课上,老师以2007年陕西的一道高考题的第一问为例,要求我们进行独立思考并自行解决这个问题:某项选拔共有三轮考核,每轮设有一个问题,能正确回答问题者进入下一轮考核,否则即被淘汰.已知某选手能正确回答第一、二、三轮问题的概率分别为54,53,52,且各轮问题能 In a probabilistic problem class, the teacher took the first question of a college entrance examination question in Shaanxi in 2007 as an example, asking us to think independently and solve the problem on our own: a selection of a total of three rounds of assessment, each round has a question, The person who can correctly answer the question enters the next round of assessment, otherwise it is eliminated. The probability that a certain player can correctly answer the first, second and third rounds of questions is 54, 53, 52 respectively, and each round of question can