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# My approach: average is 7 kg so total weight will be 21 kg,

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Manager
Joined: 22 Sep 2008
Posts: 122
My approach: average is 7 kg so total weight will be 21 kg, [#permalink]

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05 Oct 2008, 03:50
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

My approach:

average is 7 kg so total weight will be 21 kg,

now median is 9 kg means middle box is of 9 kg weight

so other two box weight will be 21-9 = 12 kg..

now they used lighest word in question mean 6 -6 is not possible

other possible combination would be 5-7 ,4-8, 3-9 , 2-10 ,1-11

so maximum weight will be 5kg for lighest box..........

*
What is median of 3-9-9 ? is it 9?

Thanks
Vishal Shah
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Senior Manager
Joined: 09 Oct 2007
Posts: 466
Re: VS: Lightest box weight [#permalink]

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05 Oct 2008, 11:31
Yes, median of 3-9-9 is 9.
SVP
Joined: 17 Jun 2008
Posts: 1547
Re: VS: Lightest box weight [#permalink]

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05 Oct 2008, 12:28
Vishal, in your steps, the combination of (5,7) and (4,8) will not be possible as otherwise median will not remain 9. Hence, out of the remaining three combinations, maximum possible weight of the lightest box will be 3.
Re: VS: Lightest box weight   [#permalink] 05 Oct 2008, 12:28
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