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

游客2024-01-12 64

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.

—HowmanystudentsaregoingtotheGreatWall?—________.A、NoneB、NooneC、NoD

Theyare________studentsthattheyallperformedwellinthenationwideexaminat

Inasampleof800highschoolstudentsinwhichallstudentsareeitherfreshme

KingSchoolhasanenrollmentof900students.Theschooldayconsistsof6clas

Schoolsexpecttextbookstobeavaluablesourceofinformationforstudents

Schoolsexpecttextbookstobeavaluablesourceofinformationforstudents

Schoolsexpecttextbookstobeavaluablesourceofinformationforstudents

Schoolsexpecttextbookstobeavaluablesourceofinformationforstudents

Whencollegestudentswereaskedabouttheirexperiencesinchildhood,thosewho

InMarch300collegestudentsturnedoutinWashingtontoprotestagainstpropos

Manycriticsofthecurrentwelfaresystemarguethatexistingwelfareregul

为了规避布雷顿森林体系崩溃后巨大的汇率波动风险而出现的金融期货品种是()。A、利率期货B、股指期货C、股票期货D、外汇期货D外汇期货是指以汇率

AWonderfulPresentPeteRich

Onemajorobstacletoeconomicdevelopmentispopulationgrowth.Thepopulat

利率与证券投资的关系，以下（）叙述是正确的A.利率上升，则证券价格上升 B.

下列哪项不符合房间隔缺损A.胸透示肺门"舞蹈征" B.超声显示室间隔与左室后壁

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