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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 [#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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Shouvik.

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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: Researchers have found that when very overweight people [#permalink] New post 15 Jan 2013, 19:55
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chiccufrazer1 wrote:
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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It's something we call the ANT (Assumption Negation Technique)
To understand it, you first need to understand what an assumption is. An assumption is a necessary missing premise. Premises support the conclusion. An assumption is also a premise but it is not given in the argument. Additionally, it is a necessary premise for the conclusion to hold true.

Say, take a simple example:

You are studying very hard. You are putting in 10 hrs a day. You work your way through many questions every day. You will pass the test.

Premises:
You are studying very hard.
You are putting in 10 hrs a day.
You work your way through many questions every day.

Conclusion:
You will pass the test.

Assumption:
Is there a premise you NEED to make the conclusion hold?
"Hard work is sufficient to pass the test"

This is an assumption the author is making. He hasn't said this as such in his argument but he is assuming it. He is assuming that hard work is enough to pass.

The argument would be more complete if it looked like this:
You are studying very hard. You are putting in 10 hrs a day. You work your way through many questions every day. Hard work is sufficient to pass the test. Hence, you will pass the test.

What if I negate this assumption and make it: "Hard work is not sufficient to pass the test"
Can my conclusion still hold?
So you are studying very hard but hard work alone may not be enough. Can I say that you will pass the test? No. This is the point of negating the assumption. If the assumption is negated, the conclusion cannot hold. It is necessary that the assumption must hold if the conclusion has to hold.

If you negate an option and there is still a possibility that the conclusion can hold, it means the option is not an assumption.

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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.
Thanks,
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Re: Researchers have found that when very overweight people, who [#permalink] New post 03 Mar 2014, 01:57
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"Relatively few" is what is important to note in choice A. Relatively few will continue eating less means a lot will eat more again. Hence they will regain their weight. A is the choice. I picked C without reading A properly.

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Re: Researchers have found that when very overweight people, who   [#permalink] 03 Mar 2014, 01:57
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