题目
单项选择题
位置4的问题 Suppose X is a random variable representing rolling a six-sided dice. Assume the dice is fair, so there is an equal probability of rolling any number 1 through 6. What is the following probability? P(2≤X≤5) 13122356清除选择
选项
A.1
3
B.1
2
C.2
3
D.5
6
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标准答案
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思路分析
以下为题干与选项的逐步分析,帮助理解各选项的合理性与不合理之处。
题干要点:抛掷一个公平的六面骰子,X 表示点数,取值为1到6。要求计算 P(2 ≤ X ≤ 5),即点数在2、3、4、5之间的概率。
选项分析:
选项1: 1
3
这表示分数为 1/3。若要判断其是否合适,需要看分子分......Login to view full explanation登录即可查看完整答案
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