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15 items

by crackgmat007 » Tue Oct 13, 2009 7:40 am
The average weight of 15 items is 8 kg. The least average weight of 5 items of these 15 is 5 kg. If no item weighs less than 5 kg, what is the maximum number of items that can have the same weight?

3
5
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14
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by 2010gmat » Tue Oct 13, 2009 10:16 am
Is it 14?
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by crackgmat007 » Tue Oct 13, 2009 11:18 am
2010gmat wrote:Is it 14?
Yes. Explanation pls
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by 2010gmat » Tue Oct 13, 2009 7:53 pm
least weight = 5 ..

15 items avg weight = 8

total weight = 15* 8 = 120 kg ..

lets take 14 items of 5 kg each and one item weighing 50 kg
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by ssuarezo » Tue Oct 13, 2009 8:50 pm
2010gmat wrote:least weight = 5 ..

15 items avg weight = 8

total weight = 15* 8 = 120 kg ..

lets take 14 items of 5 kg each and one item weighing 50 kg
Hi:
The statement: "the least average weight of 5 items of these 15 is 5 kg." is useless .. that confused me. Thank you for your explanation.
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