首页
登录
职称英语
Suppose x and y are selected randomly from the set {1, 2, 3, 4, 5} and they can
Suppose x and y are selected randomly from the set {1, 2, 3, 4, 5} and they can
游客
2025-02-23
39
管理
问题
Suppose x and y are selected randomly from the set {1, 2, 3, 4, 5} and they can repeat. What is the probability that xy+y is odd?
选项
答案
0.24
解析
由xy+y是奇数,可以推出xy和y是一奇一偶。若y是偶数,z是奇数,xy+y是偶数,不符合题意。若y是奇数,x是偶数,xy+y是奇数,符合题意。接下来就要从(1,2,3,4,5)中选1个奇数和1个偶数。(1,2,3,4,5}中一共有2个偶数,3个奇数。因此x有2个选择:2、4;y有3个选择:1、3、5。则用乘法原理算出xy+y是奇数的情况有2×3=6种。不考虑奇偶性,则总的选择有5×5=25种。所以,概率P=6/25=0.24。
转载请注明原文地址:https://tihaiku.com/zcyy/3969729.html
相关试题推荐
Supposexandyareselectedrandomlyfromtheset{1,2,3,4,5}andtheycan
SupposeABCDisarectangle,Oisthecenterofthecircle.Ifthecoordinateso
CLINCH:A、obscureB、splitrandomlyC、coddleD、evokesuspicionE、awakenB
POSTURE:A、demandrandomlyB、actnormallyC、detailmeticulouslyD、advertisebroad
CLINCH:A、obscureB、splitrandomlyC、coddleD、evokesuspicionE、awakenB
Theconsumeradvocateclaimedthatwhiledrugmanufacturers(i)______thesuppose
Thediplomat,selectedforherdemonstratedpatienceandskillinconductingsuc
Howcouldlifeinbigcitiesbemadeeasier? Isupposethatwecanmakelifein
TheBountyHuntersAHereisadilemma.Supposeyou
TheBountyHuntersAHereisadilemma.Supposeyou
随机试题
•Readthetextbelowabouthowconsumersdecidewhattobuy.•Inmostofthel
Completethesummarybelow.ChooseNOMORETHANTWOWORDSfromthepassagefore
表示祝福expressgoodwishes
Forsomeeducators,thereisnothingwrongwithfunandgames.Agroupcalle
Earlyinthefilm"ABeautifulMind",themathematicianJohnNashisseensi
图4-3是四个国家人口死亡率和人口出生率示意图,正确叙述的是( ) A.图
修复前正畸治疗主要包括A.开拓失牙间隙,调整牙齿位置 B.竖直倾斜基牙,集中间
下列情形中不应当被认为是工伤的是( )。A.患职业病的 B.患肺炎的 C.
儿童在知道“青菜”、“萝卜”和“菠菜”等概念之后,再学习“蔬菜”这个概念属于()
投资项目决策分析与评价的基本要求包括贯彻落实科学发展观、资料数据准确可靠和()
最新回复
(
0
)