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
2024-01-13
13
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/3360175.html
相关试题推荐
Thepatientsbelievethatthedoctorknowsexactlyhowtoputthem______.A、corre
Everythingweeatanddrinkcontainssomesalt;wecanmeetthebody’sneedfor
Wemustleavethepartyatexactly9:00________we’llbelateforwork.A、forel
Thetwogirlslookexactly______inappearance.A、sameB、alikeC、likeD、sameone
Whatexactlyisalie?Isitanythingwesaywhichweknowisuntrue?Oris
Ajarcontainsonlyred,yellow,andorangemarbles.Ifthereare3red,5yello
Intherectangularquadrantsystemshownabove,whichquadrant,ifany,contains
Acertainjarcontains100jellybeans:50white,30green,10yellow,5red,4
Alargeflowerarrangementcontains3typesofflowers:carnations,lilies,and
Exactly3depositshavebeenmadeinasavingsaccountandtheamountsofthede
随机试题
NewresearchfromtheUnitedStatessuggeststhatthemillennia-oldtherapy
Whatisyourfavoritecolor?Doyoulikeyellow,orange,andred?Ifyoudo,
Weknowthatthepeopleinourfamily,school,andpeergroupaffecttheper
小学音乐《动物说话》 一、考题回顾 题目来源1月6日上午山东省淄博市面
如图所示杆ACB,其正确的受力图为()。 A.图(A) B.图(B)
以下不属于社区自治组织培育的重点是()A.志愿者协会 B.业主委员会 C
我国目前有毒性中药A:11种 B:27种 C:28种 D:29种 E:4
(2022上半年真题)第二天一早李老师就要交职称材料了,她发现还缺少2份听课材料
下列属于土地使用管制的事项有()A.建筑物四周应留有一定的空地作为建筑物的绿地和
在社会工作研究中,众数和中位数是反映统计结果集中趋势的指标。调查发现5位社会居民
最新回复
(
0
)