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[問題]GWD3 Q14

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[問題]GWD3 Q14

文章amyshen » 2005-02-22 23:59

:smile
Q14
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

看不太懂題目耶...拜託好心人幫我 ...感謝感謝 ANS (E) ;yes;
amyshen
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註冊時間: 2004-12-23 00:33

文章cocaine » 2005-02-23 00:03

設W平均a,V平均b. red的長度=L
L=a-18
L=b+6
上面2式相減,a-b=24.
ans:E
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cocaine
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註冊時間: 2004-12-23 23:53
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