In a graduating class of 236 students, 142 took algebra and 121 took chemistry.

游客2025-02-24 19

问题 In a graduating class of 236 students, 142 took algebra and 121 took chemistry. What is the greatest number of students that could have taken both algebra and chemistry?

选项 A、21
B、27
C、37
D、121
E、142

答案 D

解析一个236名学生的研究生班，有142人选修代数，121人选修化学，问最多有多少人既修代数又修化学?
解：本题的正确答案为(D)。本题也即求两个集合交集的最大值，交集中的元素数小于或等于较小的集合中的元素数，所以最多有121个同时选了两门课。

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In a graduating class of 236 students, 142 took algebra and 121 took chemistry.

Collegestudentsshouldbeencouragedtopursuesubjectsthatinterestthemrath

Inahistoryclassthatconsistedof30students,thenumberofseniorswas3mo

Inaclassof120students,60percentcanspeakFrenchandtherestcanspeako

Inagraduatingclassof236students,142tookalgebraand121tookchemistry.

Amongthe900spectatorsatafootballgame,therewasatotalofxstudentsfro

Iftheincreaseinthenumberofstudentsenrolledfrom1950to1960washalfth

Forwhichvaluesofxis6x-3＞4x+5?Solvethisproblemalgebraically,asfollow

Apollof2,000studentswastakenbeforeCentervilleCollegechangedthenam

Averageexpectedfamilycontribution(EFC)fordependentstudents,

Aschoolbushas10doubleseatsineachof2rows.Twostudentscansitineach

DealingwithLifeAbroadI.Cultureshockoflifeabroad1)Moreandmorepeople

ThelibraryofcongressinWashington,D.C.,which【C1】______thelargestco

YouhavejustreceivedaletterfromyourfriendTom,whotoldyouthatheh

[originaltext]TelephonebooksintheUnitedStateshavewhite,blueandyel

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下面说法正确的是（）。 A.该工艺流程体现了绿色化学思想 B. C. D

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