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Box W and Box V

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by success1111 » Wed May 13, 2009 8:53 am
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
Trust but verify.
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Re: Box W and Box V

by Vemuri » Wed May 13, 2009 9:02 am
I am guessing C
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by scoobydooby » Wed May 13, 2009 9:19 am
let the average length of sticks in box W be mw
let the average length of sticks in box V be mv

we want mw-mv

given that the length of each red stick=mw-18 or mv+6
equating the two we get

mw-mv=6+18=24

hence, E
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by success1111 » Wed May 13, 2009 9:23 am
scoobydooby wrote:let the average length of sticks in box W be mw
let the average length of sticks in box V be mv

we want mw-mv

given that the length of each red stick=mw-18 or mv+6
equating the two we get

mw-mv=6+18=24

hence, E
OA is E. Thanks
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