Suppose you want to select a 3-person committee from a group of 9 students. How

游客2025-02-23 38

问题 Suppose you want to select a 3-person committee from a group of 9 students. How many ways are there to do this?

选项

答案 84

解析 Since the 3 students on the committee are not ordered, you can use the formula for the combination of 9 objects taken 3 at a time, or "9 choose 3":

转载请注明原文地址:http://tihaiku.com/zcyy/3969946.html

相关试题推荐

Aboxcontains5orangedisks,4reddisks,and1bluedisk.Youaretoselectt
Supposethatthereisa6-sideddiethatisweightedinsuchawaythateachtim
Supposethatacomputerpasswordconsistsoffourcharacterssuchthatthefirst
Fromasetof100numbers,halfwereselectedtoformgroupI,and60percentof
SupposeABCDisarectangle,Oisthecenterofthecircle.Ifthecoordinateso
Fourdifferentpersonswillbeselectedfrom2menand5womentoserveonacom
Fivepairsofsocksareofdifferentcolor.Iftwosocksaretobeselectedatr
xisselectedfromsetX{-1,3,6}andyisselectedfromsetY{-2,4,5,7}Qu
Select4peoplefrom3boysand3girls.Whatistheprobabilityoftwoboysand
Alanguageclasshas155students.80ofthemcanspeakEnglish,40ofthemcan

随机试题

[img]2012q2/ct_epej_epelist_0101_20124[/img][originaltext]Tomgotalittledog
WhichactivityoftheUnionisnotmentionedbythespeaker?[br][originaltext
DothefollowingstatementsagreewiththeviewsofthewriterinReadingPassag
某二类城市将沿江新建一座自来水厂，采用常规工艺臭氧活性炭深度处理下列关于该水厂设
患者，男性，30岁。挤压面部疖肿后出现寒战、高热1天。查：血白细胞20×10／L
患儿8个月，平时经常腹泻，近2个月面色苍白，食欲缺乏，喜吃土，精神不活泼。体检：
下列属于躯干骨的是()。A.锁骨 B.胸骨 C.肋骨 D.坐骨
关于项目施工成本核算对象划分的说法，正确的有()。A、一个单位工程由几个施工单
160、金属护层采取交叉互联方式时，应逐相进行导通测试，确保连接方式正确。（
A.7 B. C. D.

最新回复(0)

Suppose you want to select a 3-person committee from a group of 9 students. How

Aboxcontains5orangedisks,4reddisks,and1bluedisk.Youaretoselectt

Supposethatthereisa6-sideddiethatisweightedinsuchawaythateachtim

Supposethatacomputerpasswordconsistsoffourcharacterssuchthatthefirst

Fromasetof100numbers,halfwereselectedtoformgroupI,and60percentof

SupposeABCDisarectangle,Oisthecenterofthecircle.Ifthecoordinateso

Fourdifferentpersonswillbeselectedfrom2menand5womentoserveonacom

Fivepairsofsocksareofdifferentcolor.Iftwosocksaretobeselectedatr

xisselectedfromsetX{-1,3,6}andyisselectedfromsetY{-2,4,5,7}Qu

Select4peoplefrom3boysand3girls.Whatistheprobabilityoftwoboysand

Alanguageclasshas155students.80ofthemcanspeakEnglish,40ofthemcan

[img]2012q2/ct_epej_epelist_0101_20124[/img][originaltext]Tomgotalittledog

WhichactivityoftheUnionisnotmentionedbythespeaker?[br][originaltext

DothefollowingstatementsagreewiththeviewsofthewriterinReadingPassag

某二类城市将沿江新建一座自来水厂，采用常规工艺臭氧活性炭深度处理下列关于该水厂设

患者，男性，30岁。挤压面部疖肿后出现寒战、高热1天。查：血白细胞20×10／L

患儿8个月，平时经常腹泻，近2个月面色苍白，食欲缺乏，喜吃土，精神不活泼。体检：

下列属于躯干骨的是()。A.锁骨 B.胸骨 C.肋骨 D.坐骨

关于项目施工成本核算对象划分的说法，正确的有()。A、一个单位工程由几个施工单

160、金属护层采取交叉互联方式时，应逐相进行导通测试，确保连接方式正确。（

A.7 B. C. D.