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# A meatman weighed some pieces of beef and recorded the

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Manager
Joined: 24 Sep 2008
Posts: 188

Kudos [?]: 126 [0], given: 7

Schools: MIT / INSEAD / IIM - ABC
A meatman weighed some pieces of beef and recorded the [#permalink]

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03 Nov 2008, 01:00
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A meatman weighed some pieces of beef and recorded the weights by rounding off the weight to the closest integer. Finally, is difference between total actual weight and total recorded weight greater than 10pounds?

A - All pieces are less than 9.5 pounds
B - Meatman weighed 18pieces of beef

Kudos [?]: 126 [0], given: 7

Manager
Joined: 24 Sep 2008
Posts: 188

Kudos [?]: 126 [0], given: 7

Schools: MIT / INSEAD / IIM - ABC
Re: DS - Meatman [Number theory] [#permalink]

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03 Nov 2008, 01:04
My approach:
A - Number of pieces X [9.XY-9]: INSUFF
B - 18 X [A.XY-A]: INSUFF

A&B together: 18 X [9.XY-9]; SUFF-----C

I'm wrong as per OA....why?

Kudos [?]: 126 [0], given: 7

SVP
Joined: 17 Jun 2008
Posts: 1534

Kudos [?]: 279 [0], given: 0

Re: DS - Meatman [Number theory] [#permalink]

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03 Nov 2008, 02:45
It should be E.

From stmt1: it is not clear what the actual weight of the piece is. It is < 9.5 that means, it could be 1, 2, 3, 4, .....anything.

Kudos [?]: 279 [0], given: 0

Current Student
Joined: 28 Dec 2004
Posts: 3351

Kudos [?]: 319 [0], given: 2

Location: New York City
Schools: Wharton'11 HBS'12
Re: DS - Meatman [Number theory] [#permalink]

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03 Nov 2008, 07:55
i actually disagree i think ans should be C..

look worst case all meats weigh 9.4 and get rounded to 9?

which means 9.4*18= lets for argument sake round 18 to 20, then worst case actual weight would be 8lbs heavier than estimated..

either way the estimated weight would be less than 10lb..

Kudos [?]: 319 [0], given: 2

SVP
Joined: 17 Jun 2008
Posts: 1534

Kudos [?]: 279 [0], given: 0

Re: DS - Meatman [Number theory] [#permalink]

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03 Nov 2008, 10:44
fresinha12 wrote:
i actually disagree i think ans should be C..

look worst case all meats weigh 9.4 and get rounded to 9?

which means 9.4*18= lets for argument sake round 18 to 20, then worst case actual weight would be 8lbs heavier than estimated..

either way the estimated weight would be less than 10lb..

Thanks for pointing out. I overlooked it.

However, the answer should be B. Irrespective of the weight of individual piece, if the weight is >= x.5, it will be rounded to the next integer and if it is <x.5 then to the lower integer and since there are only 18 pieces, in either case the weight difference will be < 10 lbs.

Kudos [?]: 279 [0], given: 0

Current Student
Joined: 28 Dec 2004
Posts: 3351

Kudos [?]: 319 [0], given: 2

Location: New York City
Schools: Wharton'11 HBS'12
Re: DS - Meatman [Number theory] [#permalink]

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03 Nov 2008, 10:47
i agree it should be B..

i have a bad habit of forgetting what the stupid question was..grrr

B is sufficient..cause 18*(0.4) <10Lbs

Kudos [?]: 319 [0], given: 2

Re: DS - Meatman [Number theory]   [#permalink] 03 Nov 2008, 10:47
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# A meatman weighed some pieces of beef and recorded the

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