首页
登录
职称英语
Two dices each has six sides, which represent six values 1, 2, 3, 4, 5, 6 respec
Two dices each has six sides, which represent six values 1, 2, 3, 4, 5, 6 respec
游客
2024-01-13
20
管理
问题
Two dices each has six sides, which represent six values 1, 2, 3, 4, 5, 6 respectively. Cast the two dices and get two values, what is the probability of one value being 2 more than the other?
选项
A、4/30
B、2/9
C、1/9
D、1/18
E、7/36
答案
B
解析
每个骰子都有6种可能的取值,因此分母所有可能的方式有:6×6=36。分子为满足要求的取法,要使一个骰子的值比另一个骰子的值大2,有多少种可能呢?下面是差为2的数值对:(3,1),(4,2),(5,3),(6,4)。题目中说一个骰子的值比另一个骰子的值大2,没有具体说是哪一个骰子大,那么两个骰子都有可能大,所以尽管上面列出4对,但是实际上应该算作有4×2=8种,这样所求概率是8/36=2/9,答案应该是B。
转载请注明原文地址:https://tihaiku.com/zcyy/3360000.html
相关试题推荐
Therespectinwhichhewasheldpartlyowingtothemanhimself,withhiswarm
Friendshipisunconditionalanduncritical,basedonlyonmutualrespectand
Friendshipisunconditionalanduncritical,basedonlyonmutualrespectand
Friendshipisunconditionalanduncritical,basedonlyonmutualrespectand
Justasthelionrepresentsstrength,thepigeonis______peaceingeneralcase
Hewasn’t______forwhathadhappened.A、reliableB、respectiveC、responsibleD、pr
Howfarwashe______forwhathadhappened?A、reliableB、respectiveC、responsibl
Somanyrepresentatives______,theconferencehadtobeputoff.A、wereabsentB
Youshouldrespectothers’opinions,andatthesametimeyoushouldinsiston__
Whichofthefollowingisequaltox24forallpositivevaluesofx?A、x12+x12B、
随机试题
Ithasbeenproventhatshortburstsofconcentrationrepeatedfrequentlyar
IsHigherEducationaBubble?A)MycolleagueatDemocracyin
Thechallengeofwritingapowerfulcoverletter(附信)canleadjobcandidate
[originaltext]W:So,Tom,Ijusttalkedtomyfriendwhohasjustmarriedrecen
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性: A.如
在Potterpoint中,演示文稿基本组成单元是()A.文本 B.图形
具有泻下作用、外用可回乳的药物是A.番泻叶 B.芒硝 C.火麻仁 D.芦荟
根据《会计法》的规定,会计记录的文字应当使用中文。在民族自治地方,会计记
下列关于两阶段招标说法,正确的是()。A.技术复杂项目和无法精确拟定技术规格
根据《注册造价工程师管理办法》,对于已取得造价工程师注册证书人员,发现有(
最新回复
(
0
)