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Researchers have found that when very overweight people, who

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Researchers have found that when very overweight people, who [#permalink] New post 10 Apr 2005, 02:56
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Researchers have found that when very overweight people, who tend to have relatively low metabolic rates, lose weight primarily through dieting, their metabolism generally remain unchanged. They will thus burn significantly fewer calories at the new weight than do people whose weight is normally at that level. Such newly thin persons will, therefore, ultimately regain weight until their body size again matches their metabolic rate.

The conclusion of the argument above depends on which of the following assumptions?

A: Relatively few very overweight people who have dieted down to a new weight tend to continue to consume substantially fewer calories than do people whose normal weight is at that level.
B: The metabolisms of people who are usually not overweight are much more able to vary than the metabolisms of people who have been very overweight.
C: The amount of calories that a person usually burns in a day is determined more by the amount that is consumed that day than by the current weight of the individual.
D: Reseachers have not yet determined whether the metabolic rates of formerly very overweight individuals can be accelerated by means of chemical agents.
E: Because of the constancy of their metabolic rates, people who are at their usual weight normally have as much difficulty gaining weight as they do losing it.
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Re: Researchers have found that when very overweight people, who [#permalink] New post 06 Nov 2012, 09:25
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Here is a reason why (C) does not work.

(C) The amount of calories that a person usually burns in a day is determined more by the amount that is consumed that day than by the current weight of the individual.

Ask ourselves...does knowing the amount of calories burned in a day affect our argument that these dieters will actually REGAIN weight? We already know that dieters' calorie burn is LOWER than that of normal people for a given weight. If weight gain is determined by calorie INTAKE minus calorie burned, then the missing part to this equation is actually calorie INTAKE (or food eaten)...which is what (A) already addressed. Does (C) address calorie INTAKE?

Is (C) something the argument DEPENDS on? This is the "A vs Not A" Framework.

Does the following work:
A case)Amount of calories burned is DETERMINED by amount consumed (rather than individual's weight) => dieters will REGAIN weight
"Not A" case) Amount of calories burned is NOT DETERMINED by amount consumed (instead, determined by individual's weight) => dieters will NOT REGAIN weight

Well, in the opposite case which is where calories burned is determined by individual's weight...then the calorie burns will be equal between avg person and the dieter because now the dieter has lost weight and become the same weight as the average person. So the amount of calories burned will equal. Thus, dieteres will NOT REGAIN weight. However, this conflicts with information in the passage...that since dieters' natural metabolism is lower, the calorie burn is LOWER than the average person. Thus conflicting information. Dieters' calorie burn cannot be LOWER than the average person AND the SAME.

Then in the "A" case, calorie burn is determined by amount consumed. Well, the dieters consume less than the average person. What does that mean for calorie burn? We know consumption is LINKED to calorie burn, but we don't know the direction. Is it dieters consume less so then calorie burn is HIGHER? or is it that the calorie burn is LOWER?

So you can see, (C) has a number of problems when the "A vs Not A" framework is applied.
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Re: Researchers have found that when very overweight people, who [#permalink] New post 05 Dec 2012, 18:21
I took me 3:26 to arrive at A by POE. Was deciding between A and C but then C is out because it's not the focus. Good question.
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Re: Researchers have found that [#permalink] New post 19 Dec 2012, 23:18
skamal7 wrote:
Researchers have found that when very overweight people, who tend to have relatively low metabolic rates, lose weight primarily through dieting, their metabolisms generally remain unchanged. They will thus burn significantly fewer calories at the new weight than do people whose weight is normally at that level. Such newly thin persons will, therefore, ultimately regain weight until their body size again matches their metabolic rate.

The conclusion of the argument above depends on which of the following assumptions?

(A) Relatively few very overweight people who have dieted down to a new weight tend to continue to consume substantially fewer calories than do people whose normal weight is at that level.

(B) The metabolisms of people who are usually not overweight are much more able to vary than the metabolisms of people who have been very overweight.

(C) The amount of calories that a person usually burns in a day is determined more by the amount that is consumed that day than by the current weight of the individual.

(D) Researchers have not yet determined whether the metabolic rates of formerly very overweight individuals can be accelerated by means of chemical agents.

(E) Because of the constancy of their metabolic rates, people who are at their usual weight normally have as much difficulty gaining weight as they do losing it.

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ALSO CAN SOMEONE EXPLAIN WHATS THE PROBLEM IN B



Conclusion: Newly thin persons will ultimately regain weight until their body size again matches their metabolic rate.

This is a find assumption question. The best way to approach it is to negate the assumption to see if the conclusion is negated or not.

(A) Relatively few very overweight people who have dieted down to a new weight tend to continue to consume substantially fewer calories than do people whose normal weight is at that level.

NOT (A) Almost all very overweight people who have dieted down to a new weight tend to continue to consume substantially fewer calories than do people whose normal weight is at that level.

If that be the case, then the newly thin people, who fewer calories will not gain weight even if their metabolism is low. This negates the conclusion. Hence this is the correct choice.

(B) The metabolisms of people who are usually not overweight are much more able to vary than the metabolisms of people who have been very overweight.

NOT (B) The metabolisms of people who are usually not overweight are much more stable than the metabolisms of people who have been very overweight.

This has no bearing on the conclusion. It only means that over weight people can have varying metabolism compared to the others.

The other choices are fairly straight forward. We don't even need to negate them to check. They are all out of context choices.

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Re: Researchers have found that [#permalink] New post 20 Dec 2012, 00:31
skamal7 wrote:
Researchers have found that when very overweight people, who tend to have relatively low metabolic rates, lose weight primarily through dieting, their metabolisms generally remain unchanged. They will thus burn significantly fewer calories at the new weight than do people whose weight is normally at that level. Such newly thin persons will, therefore, ultimately regain weight until their body size again matches their metabolic rate.

The conclusion of the argument above depends on which of the following assumptions?

(A) Relatively few very overweight people who have dieted down to a new weight tend to continue to consume substantially fewer calories than do people whose normal weight is at that level.

(B) The metabolisms of people who are usually not overweight are much more able to vary than the metabolisms of people who have been very overweight.

(C) The amount of calories that a person usually burns in a day is determined more by the amount that is consumed that day than by the current weight of the individual.

(D) Researchers have not yet determined whether the metabolic rates of formerly very overweight individuals can be accelerated by means of chemical agents.

(E) Because of the constancy of their metabolic rates, people who are at their usual weight normally have as much difficulty gaining weight as they do losing it.

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ALSO CAN SOMEONE EXPLAIN WHATS THE PROBLEM IN B


In addition to the specific techniques of answering a particular type of question, a general aid to answering a question is to simplify the language. That will make life a lot easier.

For example ,

The premise of the argument: ".....They will thus burn significantly fewer calories at the new weight than do people whose weight is normally at that level."

The conclusion of the argument: "Such newly thin persons will, therefore, ultimately regain weight until their body size again matches their metabolic rate."

The gist of the premise can be noted down as follows: burn significantly fewer calories
The gist of the conclusion can be noted down as follows: ultimately gain weight

An assumption is something which connects the two.

The gist of choice A: Few continue to consume few calories

We can see that A makes sense as if overweight people burn fewer calories and continue to consume more calories at the reduced weight , they will ultimately regain weight.

The bold one is the premise, the underlined one is the assumption and the one in italics is the conclusion.

At least if one has a rough sense of the answer quickly, one can spend more time on it to check its correctness.
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Re: Researchers have found that [#permalink] New post 20 Dec 2012, 06:39
Hey
Conclusion: Newly thin person will regain the weight that they had losed.
Premise 1; They have lost weight by doing dieting, and they have low metabolism rate.
Premise 2: They will burn fewer calories at their newer weight.
Premise 3 : Metabolism reamins constant.

Prethinking
possible assumptions:
1. They start eating too mcuch; they give up dieting after attaining a desired weight.

Option A :(A) Relatively few very overweight people who have dieted down to a new weight tend to continue to consume substantially fewer calories than do people whose normal weight is at that level.
it means that there are many newly thin persons who tend to eat more. This is it ...Option A

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Re: Researchers have found that when very overweight people, who [#permalink] New post 15 Jan 2013, 11:28
ajit257 wrote:
Researchers have found that when very overweight people, who tend to have relatively low metabolic rates, lose weight primarily through dieting, their metabolisms generally remain unchanged. They will thus burn significantly fewer calories at the new weight than do people whose weight is normally at that level. Such newly thin persons will, therefore, ultimately regain weight until their body size again matches their metabolic rate.
The conclusion of the argument above depends on which of the following assumptions?
(A) Relatively few very overweight people who have dieted down to a new weight tend to continue to consume substantially fewer calories than do people whose normal weight is at that level.
(B) The metabolisms of people who are usually not overweight are much more able to vary than the metabolisms of people who have been very overweight.
(C) The amount of calories that a person usually burns in a day is determined more by the amount that is consumed that day than by the current weight of the individual.
(D) Researchers have not yet determined whether the metabolic rates of formerly very overweight individuals can be accelerated by means of chemical agents.
(E) Because of the constancy of their metabolic rates, people who are at their usual weight normally have as much difficulty gaining weight as they do losing it.

Can some explain how to tackle assumption efficiently...thanks


In my humble opinion spend some time on the premise instead of jumping on to the answers. The premise is saying that 'since the metabolism of the overweight people is less than the normal people at that weight, the overweight people who have reduced their weight by dieting will eventually gain the weight'. If you just think about this then only possibility which can make the premise true is if the people who reduced their weight eat the equivalent calories that the normal people at that weight eat. since overwieght people already have low metabolism, they will not burn much and store as fat.
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Re: Researchers have found that when very overweight people [#permalink] New post 15 Jan 2013, 13:34
VeritasPrepKarishma wrote:
ajit257 wrote:
thanks Amit ...I realized my mistake that i am overlooking the fact that assumtion is closely tied to conclusion ...awesome explanation.


Amit has pretty much covered all the ground. Let me just add here that an assumption is a missing premise that is necessary for the conclusion to be true. The assumption has to be true for the conclusion to be true. Hence if you are lost between 2-3 choices, negate each choice. Once you negate an option, if your conclusion can still be true, it means the option is not an assumption. It is a very useful trick.


would you please explain a little bit more on how negation works and how useful it is when tackling questions like these..thanks

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Re: ****overweight people**** [#permalink] New post 11 May 2013, 21:53
All duplicate threads on this topic have been merged.

Please read and follow the Guidelines for Posting in Verbal GMAT forum before posting anything.
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Re: Researchers have found that when very overweight people, who [#permalink] New post 12 Jul 2013, 23:36
Really tricky question! Is this level 700?
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Re: Researchers have found that when very overweight people, who [#permalink] New post 02 Mar 2014, 13:19
can anyone explain this part:
Quote:
They will thus burn significantly fewer calories at the new weight than do people whose weight is normally at that level.

I don't quite understand why "thus" fits in there.
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Re: Researchers have found that when very overweight people, who   [#permalink] 02 Mar 2014, 13:19
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