A survey of 100 persons revealed that 72 of them had eaten at restaurant P and that 52 of them had eaten at restaurant Q.Which of the following could not be the number of perspons in the surveyed group who has eaten at both P and A 20B 24C 30 D 50 E

来源：学生作业帮助网 编辑：作业帮 时间：2024/12/04 03:18:25
A survey of 100 persons revealed that 72 of them had eaten at restaurant P and that 52 of them had eaten at restaurant Q.Which of the following could not be the number of perspons in the surveyed group who has eaten at both P and A 20B 24C 30 D 50 E
xU]sF+;I;H,H@ $S;+ih"OD؁]Llj{Nm~ &v_R'] pt`޳{9JdYvl/ղ,C) rjVD&$*vAK I9̈VapJ:Rdt#UD}$b} aX GJlsay ^ ر9\̰ng#pcImF [[=?i lsn$dGp A%f߇&%X(خ]8Ɖ=ؓ~gPGpR~h`5#<ς pd-M:Eƅxt;po}JChvbS@"|&a0k?~ EOօ]\!^݄T*J7Z&sLs=h Hcx ;ބ&x<X>|(OmC5l>Y!9}@C@v Ͽ* ୊nM$?PkG >6 [Ԟܫ1gAbY vvaT@HRTǬ,LWv>̆'xXA@ <)B< yeo[{kESF"9usS׾r+zn<$1䘶g1jL͒Aliɼ%|--˒[Zr E)#NJ$:UqE2z\-EBJ0hBM4BiQT&Eb:@~¹#.ij(j*5 =U kz(T]D.'>9sWgGOM ź

A survey of 100 persons revealed that 72 of them had eaten at restaurant P and that 52 of them had eaten at restaurant Q.Which of the following could not be the number of perspons in the surveyed group who has eaten at both P and A 20B 24C 30 D 50 E
A survey of 100 persons revealed that 72 of them had eaten at restaurant P and that 52 of them had eaten at restaurant Q.Which of the following could not be the number of perspons in the surveyed group who has eaten at both P and
A 20
B 24
C 30
D 50
E 52

A survey of 100 persons revealed that 72 of them had eaten at restaurant P and that 52 of them had eaten at restaurant Q.Which of the following could not be the number of perspons in the surveyed group who has eaten at both P and A 20B 24C 30 D 50 E
选择A.有28个人没有在P吃过饭,假使这28个人都在Q吃过饭（即都在52人之内）,那么另外的24人肯定都既在P 又在Q 吃过饭,这是最少的人数.因为如果52个人之中没在P中吃过饭的人少于28个,即多于24个,也就是有多于24个的人在P和Q都吃过饭.

B (72+52-100)

选A
一共一百人，52人在Q餐馆就过餐，72人在P餐馆就过餐，如果有20人同时在两个餐馆就餐，那么总人数是114人，不符合题意。

简单的集合问题，全集为100个人，子集合A有72人，子集合B有52人，问你A∩B有多少个人？
72+52-100=24，选 B

选B 24，这段话的意思是:一项100人的调查中，有72个人在饭店P吃，有52，个人在饭店Q吃，问你在两个饭店都吃过的人有多少？用100-（72+52）就可以得到了。

B.24

72+52-100=24

1+2+3=100

1+2=72     2+3=52

∴2=24

the results of a survey是什么意思 怎样用do a survey of造句 a survey of a survey of修饰主语谓语动词用单数还是复数并举例说明, Could you please give me there.A.pers B.pieces of paper C.piece of paper D.pieces of papers do a survey for与do a survey of 有什么区别 do a survey on和do a survey of有什么区别 do a survey for与do a survey of 有什么区别?急!~~ do a survey of和do a survey for的区别,最好有例句. 什么时候用do a survey of什么时候用do a survey to We did a survey of what movies studentslike watching.翻译 【改错】:We made a survey of all the students. Did a survey 是for 、about还是of 《A Survey of English Literature》 是谁写的 We did a survey of our readers.(改为否定句) We __ __ a survey of our readers. why not make a survey about style of uniforms?___ ___makeing a survey about style of uniforms?改为同义句 麻烦你们告诉我原因,否则我还是不明白的,谢谢你们了.I'm __ what sports students like doing.A:doing a survey of B:making a survey of C:do a survey about D:make a survey about (请问do a survey of 等于make a survey of ) Our school _____ the teachers about their teaching last week.A.made a survey of B.do a survey ofC.made a survey for D.do a survey for do a survey 翻译?