GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 17 Jul 2018, 08:08

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# V10-15

Author Message
TAGS:

### Hide Tags

Founder
Joined: 04 Dec 2002
Posts: 17055
Location: United States (WA)
GMAT 1: 750 Q49 V42

### Show Tags

17 Aug 2015, 11:18
00:00

Difficulty:

35% (medium)

Question Stats:

64% (01:12) correct 36% (01:08) wrong based on 58 sessions

### HideShow timer Statistics

Pilates is a physical activity that focuses on strengthening the body’s core. A study was conducted with certain members of a Pilates studio. Researchers selected 100 people and instructed them to do Pilates for 30 minutes each day over the course of a month. The group was selected to include people with similar diets, and all the study participants adhered to the instructions. At the end of the study, it was found that the group lost an average of 2.6 pounds. The researchers concluded that Pilates is an effective weight loss treatment.

Which of the following is an assumption made by the researchers in drawing their conclusion?

A. The group of 100 people followed a low calorie diet
B. Pilates is an activity that burns calories
C. Some of the study participants enjoyed doing Pilates more than others
D. If the group of 100 people did no physical activity at all, they would not have lost weight
E. Some of the study participants would have done 30 minutes of Pilates each day even if they were not part of the study

_________________

Founder of GMAT Club

Just starting out with GMAT? Start here... or use our Daily Study Plan

Co-author of the GMAT Club tests

Founder
Joined: 04 Dec 2002
Posts: 17055
Location: United States (WA)
GMAT 1: 750 Q49 V42

### Show Tags

17 Aug 2015, 11:18
Official Solution:

Pilates is a physical activity that focuses on strengthening the body’s core. A study was conducted with certain members of a Pilates studio. Researchers selected 100 people and instructed them to do Pilates for 30 minutes each day over the course of a month. The group was selected to include people with similar diets, and all the study participants adhered to the instructions. At the end of the study, it was found that the group lost an average of 2.6 pounds. The researchers concluded that Pilates is an effective weight loss treatment.

Which of the following is an assumption made by the researchers in drawing their conclusion?

A. The group of 100 people followed a low calorie diet
B. Pilates is an activity that burns calories
C. Some of the study participants enjoyed doing Pilates more than others
D. If the group of 100 people did no physical activity at all, they would not have lost weight
E. Some of the study participants would have done 30 minutes of Pilates each day even if they were not part of the study

(A) If the study participants all had a low calorie diet, this would tend to undermine the researchers’ conclusion because it provides an alternative explanation for the weight loss. Thus, this is not an assumption of the researchers.

(B) This may be true, but it is not an assumption made by the researchers in drawing their conclusion.

(C) This answer choice is irrelevant.

(D) Correct. It is possible that, if the study participants did not physical activity at all, they would still have lost weight. The researchers would have to assume this is not true in order to reach their conclusion that Pilates is an effective weight loss treatment.

(E) This answer choice is irrelevant.

_________________

Founder of GMAT Club

Just starting out with GMAT? Start here... or use our Daily Study Plan

Co-author of the GMAT Club tests

Retired Moderator
Joined: 18 Sep 2014
Posts: 1166
Location: India

### Show Tags

02 Oct 2015, 00:33
Pilates is a physical activity that focuses on strengthening the body’s core.
A study was conducted with certain members of a Pilates studio with selected 100 people and instructed them to do Pilates for 30 minutes each day over the course of a month.
The group was selected to include people with similar diets, and all the study participants adhered to the instructions.
At the end of the study, it was found that the group lost an average of 2.6 pounds. The researchers concluded that Pilates is an effective weight loss treatment.

Which of the following is an assumption made by the researchers in drawing their conclusion?

A. The group of 100 people followed a low calorie diet
(weakens the conclusion)
B. Pilates is an activity that burns calories
(can be true kept it aside)
C. Some of the study participants enjoyed doing Pilates more than others
(Enjoyment is not important here and this option defines some of them.)
D. If the group of 100 people did no physical activity at all, they would not have lost weight
(can be true as well)
E. Some of the study participants would have done 30 minutes of Pilates each day even if they were not part of the study
(People who are not part of study are not of concern here. Even if it is do this statement defines only few.)

I got confused between options B and D.
If we apply negation test for both options
B. Pilates is an activity that burns calories
negated: Pilates is not an activity that burns calories
then Pilates cannot result in loss of an average of 2.6 pounds. The researchers conclusion that Pilates is an effective weight loss treatment falls apart.

same is the case with D as well.
Quote:
(D) Correct. It is possible that, if the study participants did not physical activity at all, they would still have lost weight. The researchers would have to assume this is not true in order to reach their conclusion that Pilates is an effective weight loss treatment.

Can someone explain why B is wrong
_________________

The only time you can lose is when you give up. Try hard and you will suceed.
Thanks = Kudos. Kudos are appreciated

http://gmatclub.com/forum/rules-for-posting-in-verbal-gmat-forum-134642.html
When you post a question Pls. Provide its source & TAG your questions
Avoid posting from unreliable sources.

My posts
http://gmatclub.com/forum/beauty-of-coordinate-geometry-213760.html#p1649924
http://gmatclub.com/forum/calling-all-march-april-gmat-takers-who-want-to-cross-213154.html
http://gmatclub.com/forum/possessive-pronouns-200496.html
http://gmatclub.com/forum/double-negatives-206717.html
http://gmatclub.com/forum/the-greatest-integer-function-223595.html#p1721773

Math Expert
Joined: 02 Aug 2009
Posts: 6218

### Show Tags

02 Oct 2015, 00:44
Mechmeera wrote:
Pilates is a physical activity that focuses on strengthening the body’s core.
A study was conducted with certain members of a Pilates studio with selected 100 people and instructed them to do Pilates for 30 minutes each day over the course of a month.
The group was selected to include people with similar diets, and all the study participants adhered to the instructions.
At the end of the study, it was found that the group lost an average of 2.6 pounds. The researchers concluded that Pilates is an effective weight loss treatment.

Which of the following is an assumption made by the researchers in drawing their conclusion?

A. The group of 100 people followed a low calorie diet
(weakens the conclusion)
B. Pilates is an activity that burns calories
(can be true kept it aside)
C. Some of the study participants enjoyed doing Pilates more than others
(Enjoyment is not important here and this option defines some of them.)
D. If the group of 100 people did no physical activity at all, they would not have lost weight
(can be true as well)
E. Some of the study participants would have done 30 minutes of Pilates each day even if they were not part of the study
(People who are not part of study are not of concern here. Even if it is do this statement defines only few.)

I got confused between options B and D.
If we apply negation test for both options
B. Pilates is an activity that burns calories
negated: Pilates is not an activity that burns calories
then Pilates cannot result in loss of an average of 2.6 pounds. The researchers conclusion that Pilates is an effective weight loss treatment falls apart.

same is the case with D as well.
Quote:
(D) Correct. It is possible that, if the study participants did not physical activity at all, they would still have lost weight. The researchers would have to assume this is not true in order to reach their conclusion that Pilates is an effective weight loss treatment.

Can someone explain why B is wrong

Hi,
why do you take ". Pilates is an activity that burns calories" as an assumption..
It is more like an inference...
this is an inference from the conclusion..
And D is clearly providing you the assumption
_________________

1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html

GMAT online Tutor

Intern
Joined: 17 Jun 2014
Posts: 30

### Show Tags

03 Jan 2017, 22:30
Hi chetan2u,

That is quite a vague explanation I would say. Even I have the same doubt. I went for B. If option B is given as an option to answer this question, It has to be evaluated for the same. There is no question of taking or not taking it as an assumption . You may be right in saying it is more of a inference but negation test works for this as well. Could anybody provide an explanation that would clarify my doubt.

Thanks,
Vaibhav
Retired Moderator
Joined: 14 Dec 2013
Posts: 3198
Location: Germany
Schools: HHL Leipzig
GMAT 1: 780 Q50 V47
WE: Corporate Finance (Pharmaceuticals and Biotech)

### Show Tags

04 Jan 2017, 23:03
Vaibhav0607 wrote:
Hi chetan2u,

That is quite a vague explanation I would say. Even I have the same doubt. I went for B. If option B is given as an option to answer this question, It has to be evaluated for the same. There is no question of taking or not taking it as an assumption . You may be right in saying it is more of a inference but negation test works for this as well. Could anybody provide an explanation that would clarify my doubt.

Thanks,
Vaibhav

Consider the following 3 cases:

1. If you consider that burning calories and losing weight are the same thing, then B is nothing but the conclusion reworded. Hence it cannot be the assumption.

2. If you consider that burning calories and weight loss are not the same thing, and burning calories is one of the things that result in weight loss, then option B is irrelevant because in that case burning calories need not be the reason for weight loss; there could be some other mechanism by which Pilates results in weight loss. (An assumption must satisfy "must be true" condition).

3. If you consider that burning calories and weight loss are not the same thing, and burning calories is the only way of losing weight, then option B is an inference. Pilates causes losing weight, and burning calories is the only way to lose weight - hence Pilates MUST burn calories. (this is the explanation that chetan2u has given above).

In any case option B cannot be an assumption.

Please let me know if you still have doubt.
Intern
Joined: 29 Oct 2016
Posts: 15

### Show Tags

29 Sep 2017, 21:43
I chose D as I thought it is the best choice among others. However, I still think that it is may be better if we say something like " if people do not lose weight then they did not do physical activity". Because in this case it's like Pilates causes losing weight, so we should assume that not losing weight > not doing Pilates or physical activity, and can not assume that not pilates or physical activity > not losing weight ? ...
Re: V10-15   [#permalink] 29 Sep 2017, 21:43
Display posts from previous: Sort by

# V10-15

Moderators: chetan2u, Bunuel

# Events & Promotions

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.