首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
The average(arithmetic mean)of M consecutive odd integers is 10. What is the smallest number in the sequence? (1)The range of th
The average(arithmetic mean)of M consecutive odd integers is 10. What is the smallest number in the sequence? (1)The range of th
admin
2022-11-19
42
问题
The average(arithmetic mean)of M consecutive odd integers is 10. What is the smallest number in the sequence?
(1)The range of the M consecutive odd integers is 14.
(2)The greatest number of the M consecutive odd integers is 15.
选项
A、Statement (1) ALONE is sufficient, but statement (28) alone is not sufficient to answer the question asked.
B、Statement (2) ALONE is sufficient, but statement (27) alone is not sufficient to answer the question asked.
C、BOTH statement (1) and (28) TOGETHER are sufficient to answer the question asked, but NEITHER statement ALONE is sufficient.
D、EACH statement ALONE is sufficient to answer the question asked.
E、Statement (1) and(28)TOGETHER are NOT sufficient to answer the question asked, and additional data specific to the problem are needed.
答案
D
解析
设最小的奇数为a
1
,M个连续奇数是一个等差数列,公差为2,它们的平均数为10,那么它们的和为10M,在Statement (1)中,a
m
-a
1
=14,那么M=7,知道了和、项数、公差,首项当然可以求得,所以单独(1)可以回答问题。在Statement (2)中,设a
m
为原数列中最大的奇数,则a
m
=15,那么
S=10M=(a
1
+15)/2
15=a
1
+(M-1)×2
从方程组里面能够求得a
1
,也就是数列中的最小值,所以单独(2)也可以回答问题。因此D为正确答案。
转载请注明原文地址:https://kaotiyun.com/show/JVtO777K
本试题收录于:
GMAT QUANTITATIVE题库GMAT分类
0
GMAT QUANTITATIVE
GMAT
相关试题推荐
Nooneknowshowmanlearnedtomakewords.Perhapshebeganbymakingsoundslikethosemadebyanimals.Perhapshegruntedlik
Fiftyyearsago,wealthypeoplelikedhuntingwildanimalsforfun______sightseeing.
WriteashortessayentitledFastFoodandTraditionalChineseCooking.Youshouldwriteatleast120wordsfollowingtheoutlin
Withthepossibleexceptionofequalrights,perhapsthemostcontroversialissueacrosstheUnitedStatestodayisthedeathpe
Atthebeginningoflastcentury,medicalscientistsmadeaninterestingdiscovery:wearebuiltnotjustoffleshandbloodbut
Although______happenedintheArcticregionsoundslikeafairytale,ittrulyexits.
IntheUnitedStates,30percentoftheadultpopulationhasa"weightproblem".Tomanypeople,thecauseisobvious:theyeat
InShanghai,agrowingnumberofforeign-fundedbanksarelookingforlocalpeopletofillexecutivepositions(行政主管的岗位)ratherth
在盒子1中有6个红球,4个白球;在盒子2中有3个白球,5个红球,问从这两个盒子中分别摸出1个都是白球的概率?
随机试题
劳动合同被确认无效后,应当依法予以解除。
车刀在切削工件时,使工件上形成已加工表面、切削平面和待加工表面。()
如何区别不征税收入和免税收入?
某新建项目建设投资为10000万元,其中含可抵扣固定资产进项税850万元,每年营业收入为5000万元(不含税),原材料及燃料动力费用为2000万元(不含税),增值税税率均为17%,生产负荷除第1年为80%、第2年90%外,其余各年均为100%,则项目投产第
我国商业银行内部控制中存在的问题不包括()。
期货交易主要是以()为保障,从而保证到期兑现。
WhyhascrimeintheU.S.declinedsodramaticallysincethe1990s?Economistsandsociologistshaveofferedabountyofrea
许多早餐谷类食物中加有维生素添加剂,一些这样的谷类食物均提供了100%的每天维生素的建议摄取量。但是,一份比较均衡的早餐,包括各种食物,比起这种增强型早餐谷类食物自身,可以更好地获取那些维生素。以下哪一项如果是正确的,将最有力地支持以上观点?
一般人认为,广告商为了吸引顾客不择手段。但广告商并不都是这样。最近,为了扩大销路,一家名为《港湾》的家庭类杂志改名为《炼狱》,主要刊登暴力与色情内容。结果,原先《港湾》杂志的一些常年广告用户拒绝续签合同,转向其他刊物。这说明这些广告商不只考虑经济效益,而且
Oùestvotre______denaissancesùilvousplait?
最新回复
(
0
)