[問題]GWD3-14

[chelsy]

剛剛在看精華區的時候沒看到有人對這一題有問題...
可是我看了好幾遍的題目...
就是想不出有什麼方法可以解...
我想我應該是卡在那邊了 ...
有沒有哪位大大可以幫個忙...
謝謝嚕...

[chelsy]

對不起 ...
剛打太快...忘了把題目放上來...
[b]Box W and Box V each contain several blue sticks and red sticks, and all of the red sticks have the same length. The length of each red stick is 18 inches less than the average length of the sticks in Box W and 6 inches greater than the average length of the sticks in Box V. What is the average (arithmetic mean) length, in inches, of the sticks in Box W minus the average length, in inches, of the sticks in Box V?[/b]
A. 3
B. 6
C. 12
D. 18
E. 24

[DARY]

對不起 ...
剛打太快...忘了把題目放上來...
Box W and Box V each contain several blue sticks and red sticks, and all of the red sticks have the same length. The length of each red stick is 18 inches less than the average length of the sticks in Box W and 6 inches greater than the average length of the sticks in Box V. What is the average (arithmetic mean) length, in inches, of the sticks in Box W minus the average length, in inches, of the sticks in Box V?
A. 3
B. 6
C. 12
D. 18
E. 24

lenth of each red stick=X
average lenth of Box W=X+18
average lenth of Box V=X-6

What is the average (arithmetic mean) length of the sticks in Box W minus the average length of the sticks in Box V?

(X+18)-(X-6)=24

Ans:E

[chelsy]

我的天阿...
竟然這麼簡單...
原來時文章沒有看仔細...
謝謝你唷...