There are 8 balls in a box, 2 of them are red, 4 of them are white, 2 of them are blue. If 2 balls are to be simultaneously and

admin2022-11-20 60

问题 There are 8 balls in a box, 2 of them are red, 4 of them are white, 2 of them are blue. If 2 balls are to be simultaneously and randomly selected, what is the probability that they will both be red?

选项 A、1/8
B、1/28
C、1/4
D、3/14
E、1/2

答案B

解析同时取出两个球共有C₈²=28种方法，而两个球都为蓝球只有一种取法，所以所求概率为1/28。

转载请注明原文地址:https://kaotiyun.com/show/84kO777K

本试题收录于： GRE QUANTITATIVE题库GRE分类

GRE QUANTITATIVE

GRE

相关试题推荐

Astheschoolyearkicksoff,parentsareonceagainstrugglingtocajole(哄骗)and,ifneedbe,dragtheirexhaustedteensouto
Regretisascommonanemotionasloveorfear,anditcanbenearlyaspowerful.So,inanewpaper,tworesearcherssetabout
ThereflectivetowersofNewYorkCity,whichisontheAtlanticmigrating(迁徙的)route,canbedeadlyforbirds."Weliveinan
Thebesttitleforthispassageis______.Whichofthefollowingdoesn’tsharethesamemeaningwiththeothers?
Itisworth______thateventhemostcomplexscientificideascaneventuallyaffectone’sdailylife.
—Theriverrunsclear.—Weallappreciatetheimportancethelocalgovernmenthas______theenvironmentalprotection.
Thefossilremainsofthefirstflyingvertebrates,thepterosaurs,haveintriguedpaleontologistslormorethantwocenturies.
Supposethatacomputerpasswordconsistsoffourcharacterssuchthatthefirstcharacterisoneofthe10digitsfrom0to9a
ENDORSE:APPROVAL::
ESOTERIC:

随机试题

用经过编码以后的数字信号来调制发光器件的发光强度，来完成电/光转换任务的电路称为()电路。
现行宪法规定，中华人民共和国的根本制度是【】
A、凉血止血，解毒敛疮B、凉血止血，活血祛瘀C、凉血止血，祛痰止咳D、凉血止血，清肝泻火E、凉血止血，清热安胎槐花的功效是
西部大开发战略关于成渝经济区战略定位的说法有()
()是一种将贷款本金分段偿还，根据资金的实际占用时间计算利息的还款方式。
下列各项属于可信性管理应遵循的基本原则的有()。
请结合实际，谈一谈你对保障法律实施对于法律施行的重要意义。
以下列举的哪些属于法学的交叉学科()
计算下列定积分：
A、theycannotaffordmoreB、theydonotwanttolosemoreC、theydonotthinkmorewilldoD、theywanttosavemoremoneyforga

最新回复(0)

There are 8 balls in a box, 2 of them are red, 4 of them are white, 2 of them are blue. If 2 balls are to be simultaneously and

GRE QUANTITATIVE

GRE

Astheschoolyearkicksoff,parentsareonceagainstrugglingtocajole(哄骗)and,ifneedbe,dragtheirexhaustedteensouto

Regretisascommonanemotionasloveorfear,anditcanbenearlyaspowerful.So,inanewpaper,tworesearcherssetabout

ThereflectivetowersofNewYorkCity,whichisontheAtlanticmigrating(迁徙的)route,canbedeadlyforbirds."Weliveinan

Thebesttitleforthispassageis______.Whichofthefollowingdoesn’tsharethesamemeaningwiththeothers?

Itisworth______thateventhemostcomplexscientificideascaneventuallyaffectone’sdailylife.

—Theriverrunsclear.—Weallappreciatetheimportancethelocalgovernmenthas______theenvironmentalprotection.

Thefossilremainsofthefirstflyingvertebrates,thepterosaurs,haveintriguedpaleontologistslormorethantwocenturies.

Supposethatacomputerpasswordconsistsoffourcharacterssuchthatthefirstcharacterisoneofthe10digitsfrom0to9a

ENDORSE:APPROVAL::

ESOTERIC:

用经过编码以后的数字信号来调制发光器件的发光强度，来完成电/光转换任务的电路称为()电路。

现行宪法规定，中华人民共和国的根本制度是【】

A、凉血止血，解毒敛疮B、凉血止血，活血祛瘀C、凉血止血，祛痰止咳D、凉血止血，清肝泻火E、凉血止血，清热安胎槐花的功效是

西部大开发战略关于成渝经济区战略定位的说法有()

()是一种将贷款本金分段偿还，根据资金的实际占用时间计算利息的还款方式。

下列各项属于可信性管理应遵循的基本原则的有()。

请结合实际，谈一谈你对保障法律实施对于法律施行的重要意义。

以下列举的哪些属于法学的交叉学科()

计算下列定积分：

A、theycannotaffordmoreB、theydonotwanttolosemoreC、theydonotthinkmorewilldoD、theywanttosavemoremoneyforga