Fifteen band menmbers ……数学题,请帮我翻译下!谢谢!

来源:百度知道 编辑:UC知道 时间:2024/06/16 16:59:47
Fifteen band menmbers from your school were selected to play in the state orchestra.Twice as many students who play a wind instrument were selected as students who play a string or percussion instrument.Of the students selected,one fifth play a string instrument.How many students playing each type of instrumengt were selected to play in the state orchestra?

15个校乐团的人被选中了,其中演奏弦乐string和打击乐percussion的人家起来是管乐器wind的两倍。15个人中,5分之1是弦乐的。那么选中的人中三种乐器的格是多少人?

下面是解:
number of students selected who play string instruments =15*(1/5)=3
let number of students selected who play percussion instruments be x.
15=3+x+(3+x)/2
x=7
number of students selected who play percussion instruments is 7.
(3+x)/2=10/2=5
number of students selected who play wind instruments is 5.

I3adI3oy - 大魔导师 十二级 的对 完解

从您的学校的十五带menmbers在状态乐队被选择使用。两次弹奏管乐器的许多名学生被选择了作为弹奏串或打击乐器的学生。学生选择,五分之一戏剧串仪器。演奏instrumengt的每种类型多少名学生被选择使用在状态乐队?

menmbers 应该是 members 吧
15乐队成员被选在省乐团演奏,奏弦乐的人数是5分1被选到的学生,
奏弦乐和拷击乐的人数是奏管乐的人的两倍,
问每种乐器的演奏人数?

15名校乐队的成员入选参加国家管弦乐队。入选演奏弦乐器或者打击乐器的学生是演奏管乐器的两倍。在所有入选的学生中,五分之一演奏弦乐器。在所有入选国家管弦乐队的学生中,各有多少人演奏每种乐器?