首页
登录
职称英语
A box of light bulbs contains exactly 3 light bulbs that are defective. What is
A box of light bulbs contains exactly 3 light bulbs that are defective. What is
游客
2025-02-27
18
管理
问题
A box of light bulbs contains exactly 3 light bulbs that are defective. What is the probability that a sample of light bulbs picked at random from this box will contain at least 1 defective light bulb?
(1) The light bulbs in the sample will be picked 1 at a time without replacement.
(2) The sample will contain exactly 20 light bulbs.
选项
A、Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B、Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C、BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D、EACH statement ALONE is sufficient.
E、Statements (1) and (2) TOGETHER are NOT sufficient.
答案
E
解析
It is clear that neither (1) alone nor (2) alone is sufficient.
Given (1) and (2), if the box contains 22 light bulbs, then a sample of 20 light bulbs must contain at least one defective light bulb, and hence the desired probability is equal to 1. However, if the box contains 22,000 light bulbs, then it is clear that the probability that a sample of 20 light bulbs contains at least one defective light bulb is less than 1.
The correct answer is E;
both statements together are still not sufficient.
转载请注明原文地址:https://tihaiku.com/zcyy/3974737.html
相关试题推荐
Merle’ssparechangejarhasexactly16U.S.coins,eachofwhichisa1-centc
Aboxoflightbulbscontainsexactly3lightbulbsthataredefective.Whatis
Alargeflowerarrangementcontains3typesofflowers:carnations,lilies,and
Exactly3depositshavebeenmadeinasavingsaccountandtheamountsofthede
BowlsXandYeachcontainedexactly2jellybeans,eachofwhichwaseitherred
AcertaintypeofdinnerwaremadeinGanandiacontainslead.Leadcanleachinto
Inadditiontoconventionalgalaxies,theuniversecontainsverydimgalaxiesth
Inadditiontoconventionalgalaxies,theuniversecontainsverydimgalaxiesth
Inadditiontoconventionalgalaxies,theuniversecontainsverydimgalaxiesth
ExactlywhenintheearlymoderneraNativeAmericansbeganexchanginganimalfu
随机试题
Thishasbeenquiteaweekforliterarycoups.Inanalmostentirelyunexpecte
[originaltext]M:Wouldyouliketogotothebeachthisafternoon?BillandMar
OxfordUniversityoncefamouslyclaimedtohavebeenfoundedbyAlfredtheG
AtthestartofhertalkRebeccapointsoutthatnewgraduatescanfindithard
Changesinthewaypeoplelivebringaboutchangesinthejobsthattheydo.
December1stisWorldAIDSDay.The【B1】______thisyearis"LiveandLetLiv
[originaltext]W:Wouldyouliketojoinusforaridearoundtheharbor?M:Wha
关于基金估值,以下表述正确的是( ).A.基金估值的第一责任主体为基金管理人
与青霉素相比,阿莫西林A.对β-内酰胺酶稳定 B.对耐药金黄色葡萄球菌有效
不是抗凝药禁忌证的是A.严重高血压病 B.活动性肺结核 C.肝肾功能不全
最新回复
(
0
)