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
55
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:http://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
(环境一旦遭到破坏)____________,ittakesmanyyearsforthesystemtorecover.Onceenviro
______isannouncedinthepapers,ourcountryhaslaunchedalarge-scalemoveme
[originaltext]W:Hi,Dick.How’sthecampinglastweek?M:Oh,itwashorrible.
下列各项中,属于职工薪酬核算范围的内容有()。A.社会保险费 B.企业职工生活
下列关于升华硫的描述中,错误的是A.治疗疥疮时,需涂抹全身 B.不得与铁制品接
共用题干 第三篇EatMore,WeighLess,LiveLong
影响胎盘药物转运的主要因素不包括A.胎儿的年龄(胎儿因素) B.药物通过胎盘转
关于报酬率的说法,正确的是( )。A.市场提取法求出的报酬率来源于市场,不能真实
首席风险官应当重点检查期货公司是否依法建立健全和有效执行的制度有()。A.
职业病诊断的首要条件是A:有明确的职业史 B:生产环境调查 C:特有的临床表
最新回复
(
0
)