首页
登录
职称英语
There are 30 students in a class. 12 of them play basketball, 15 of them play fo
There are 30 students in a class. 12 of them play basketball, 15 of them play fo
游客
2024-01-12
102
管理
问题
There are 30 students in a class. 12 of them play basketball, 15 of them play football, and 19 of them play pingpang. If 7 of them play all three activities and exactly 6 of them play two activities, how many of them play none of the three activities?
选项
A、2
B、0
C、8
D、4
E、6
答案
D
解析
设玩三种运动的人分别为A,B,C,A=12,B=15,C=19,7个人三种运动都玩,那么P=7,6个人玩两种运动,那么m=6,代入公式:30=12+15+19-6-2×7+N,得到N=4,选择D。
转载请注明原文地址:http://tihaiku.com/zcyy/3354936.html
相关试题推荐
Inahistoryclassthatconsistedof30students,thenumberofseniorswas3mo
Inagraduatingclassof236students,142tookalgebraand121tookchemistry.
Amongthe900spectatorsatafootballgame,therewasatotalofxstudentsfro
Jimscored95pointsin5basketballgamesforhisschool.Atthisrate,howman
Apollof2,000studentswastakenbeforeCentervilleCollegechangedthenam
Averageexpectedfamilycontribution(EFC)fordependentstudents,
Aschoolbushas10doubleseatsineachof2rows.Twostudentscansitineach
Jimscored95pointsin5basketballgamesforhisschool.Atthisrate,howman
Mr.Hernandez’sstudentsfilledoutasurveyaskinghowmanyhourseachstudent
Asubsandwichandasodaatabasketballgame’sconcessionstandcosts$3.40.A
随机试题
InthehousewhereIgrewup,itwasourcustomtoleavethe"onthelatch"
【B1】[br]【B2】[originaltext]Scientistshavedevelopedanewcancerdrug.So
AccordingtoKellyGrant,giftforpurchaseisacceptableonlywhen[br][origi
Thereseemstobesomethingwrongwiththemachine,________?A、doesitB、isn’ti
静态投资回收期为()A.净现金流量等于0的时期 B.净现金流量大于0的时期
管理会计师从事管理会计工作时,可以保持自己的风格,比如比较谨慎的工作风格。这符合
基金销售业务信息管理平台的前台业务系统应具备的功能不包括()。A.提供投资资讯
下列哪个方剂主治痰热结胸证A:半夏泻心汤B:麻杏甘石汤C:贝母瓜蒌散D:清
1983年的第一步“利改税”在中国的财税改革史上迈出了重大的一步,即对国有企业开
共用题干 女,22岁。左侧后牙夜间痛2天。近1年来,左上后牙咬物不适,冷热敏感
最新回复
(
0
)