问题如下图：
选项：
A. 
B. 
C. 
D. 
解释：
为什么p(4)要乘以5，p(5)只要乘以1？
NO.PZ2019040801000073问题如下Robin Hill is taking a fficult multiple choiexam. There are 5 questions in the exaneaquestion hfour choices. The choices are almost the same in eaquestion. whiof the following amouts is closest to the probability thhe will get more th3 questions correranmly guessing ? A.3.0%.B.8.79%.C.1.56%.25.0%.C is correct.考点二项分布概率计算解析二项分布中答对一题概率是25%，5道题，正确4道，5道的可能性分别是P(4) = 5 x (0.25)4 x (0.75)1= 0.0146484P(5） = 1x (0.25)5x (0.75)0 = 0.00097660.01464 + 0.00098 = 1.562%老师好，我这么做哪里错了吗？
NO.PZ2019040801000073问题如下Robin Hill is taking a fficult multiple choiexam. There are 5 questions in the exaneaquestion hfour choices. The choices are almost the same in eaquestion. whiof the following amouts is closest to the probability thhe will get more th3 questions correranmly guessing ? A.3.0%.B.8.79%.C.1.56%.25.0%.C is correct.考点二项分布概率计算解析二项分布中答对一题概率是25%，5道题，正确4道，5道的可能性分别是P(4) = 5 x (0.25)4 x (0.75)1= 0.0146484P(5） = 1x (0.25)5x (0.75)0 = 0.00097660.01464 + 0.00098 = 1.562%不知道怎呢么计算结果，按照课上的公式
NO.PZ2019040801000073 老师，是否可以列举，less than、fewer than， more than。哪个是大于等于，小于等于，小于、大于，这几个表示？
NO.PZ2019040801000073 有时候是在分不清什么时候用这个伯努利分布，什么时候用泊松分布，请问是看到possion stribution才使用泊松分布，其余的都用伯努利分布的计算公式吗？
按照题目意思，多选题有4个答案，为什么做对题目的概率是0.25。这个是单选题正确的概率吧？
