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

It is currently 15 Oct 2018, 01:39

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

A candy company conducted market research through a survey and a subse

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Manager
Manager
avatar
P
Joined: 17 May 2017
Posts: 132
GPA: 3
Reviews Badge
A candy company conducted market research through a survey and a subse  [#permalink]

Show Tags

New post 18 Jul 2017, 12:03
4
6
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

62% (01:58) correct 38% (01:44) wrong based on 306 sessions

HideShow timer Statistics

A candy company conducted market research through a survey and a subsequent taste test. In the survey, 27% of respondents said they preferred dark chocolate, 28% said they preferred white chocolate, and 45% said they preferred milk chocolate. But when the same group participated in a taste test of the company's new product line, 60% preferred dark chocolate.

Which of the following can be inferred from the information above?

A. The survey participants were generally inaccurate regarding their chocolate preferences.
B. Some people who stated a preference for white chocolate in the survey preferred dark chocolate in the taste test.
C. Some people who preferred milk chocolate in the taste test had initially stated a preference for white chocolate in the survey.
D. Some people who stated a preference for milk chocolate in the survey preferred dark chocolate in the taste test.
E. Most participants expressed a different preference in the taste test than they had indicated in the survey.​
Magoosh GMAT Instructor
User avatar
G
Joined: 28 Dec 2011
Posts: 4657
Re: A candy company conducted market research through a survey and a subse  [#permalink]

Show Tags

New post 18 Jul 2017, 16:56
3
haardiksharma wrote:
A candy company conducted market research through a survey and a subsequent taste test. In the survey, 27% of respondents said they preferred dark chocolate, 28% said they preferred white chocolate, and 45% said they preferred milk chocolate. But when the same group participated in a taste test of the company's new product line, 60% preferred dark chocolate.

Which of the following can be inferred from the information above?

A. The survey participants were generally inaccurate regarding their chocolate preferences.
B. Some people who stated a preference for white chocolate in the survey preferred dark chocolate in the taste test.
C. Some people who preferred milk chocolate in the taste test had initially stated a preference for white chocolate in the survey.
D. Some people who stated a preference for milk chocolate in the survey preferred dark chocolate in the taste test.
E. Most participants expressed a different preference in the taste test than they had indicated in the survey.​

Dear haardiksharma,

I'm happy to respond. :-) This is a fantastic question!

What do we know for sure? We know 27% of the folks in the survey liked dark chocolate, and this shot up to 60% in the taste test. Now, it could be true that just about everyone swapped around, and almost no one preferred in the taste test what they said they liked on the survey. It's possible for (A) to be false. Keep that in mind.

Suppose we try to keep as many people as possible aligned with their original choice. For started, all 27% that said dark chocolate are still going to prefer it during the taste test. We need another 33% to come from somewhere. Could all of them come from group that preferred the milk chocolate in the survey? Yes, 45% > 33%, so we could fill the rest of this 60% with folks from the milk chocolate survey group and not even touch those that initially preferred white chocolate. Thus, we know it's possible for (B) to be false.

Could all of the rest of that 60% come from group that preferred the white chocolate in the survey? NO! 28% < 33%, so even if all those who initially preferred white chocolate and all of those who initial preferred went into the dark chocolate after the taste test group, that's only 27% + 28% = 55%, not enough. Inevitably, we will have to draw some of the milk chocolate people into the group. In fact, it is impossible to construct a scenario in which none of those who preferred milk chocolate first would wind up in the group preferring dark chocolate in the taste test, because there has to be some overlap between that initial 45% and the final 60%.

The answer has to be (D).

Does this make sense?
Mike :-)
_________________

Mike McGarry
Magoosh Test Prep


Education is not the filling of a pail, but the lighting of a fire. — William Butler Yeats (1865 – 1939)

Manager
Manager
avatar
B
Joined: 20 Aug 2015
Posts: 98
Location: India
GMAT 1: 710 Q50 V36
GPA: 3
GMAT ToolKit User
Re: A candy company conducted market research through a survey and a subse  [#permalink]

Show Tags

New post 19 Jul 2017, 10:37
1
45% said they preferred milk chocolate. But 40% indicated that they do not prefer dark chocolates after the taste test (as 60% prefer dark chocolates). So there must be some people who earlier said they preferred milk chocolate during the survey and later said they prefer dark chocolates.

Hence, answer D.
Senior Manager
Senior Manager
User avatar
V
Joined: 06 Jan 2015
Posts: 484
Location: India
Concentration: Operations, Finance
GPA: 3.35
WE: Information Technology (Computer Software)
Premium Member
A candy company conducted market research through a survey and a subse  [#permalink]

Show Tags

New post 24 Jan 2018, 00:54
1

VERITAS PREP OFFICIAL SOLUTION:



This inference problem forces you to do some math to determine which answer must be true. You know from the given information that some preferences were different between the survey and the taste test (dark chocolate went from 27% to 60%, from the lowest value to the highest, so some people must have changed their preferences from either milk or white chocolate), but each answer choice will require some analysis to determine whether it "could be true" (incorrect answer) or "must be true" (correct).

Choice A is the qualitative answer and certainly could be true, but isn't necessarily. What if this company simply has lousy white and milk chocolate, but very good dark chocolate? The respondents could have been very accurate in relaying their general preferences, but those preferences just didn't hold in this particular case. So choice A is incorrect.

Choice B is more quantitative. It certainly could be true but doesn't have to be. You know that dark chocolate went from 27% to 60%, so it picked up a net gain of 33%. This could be true if some of that gain came from white and some from milk. But since you do not have the taste test totals from white and milk you can play with different combinations. Suppose all who said dark in the survey said dark in the taste test, and then 33% defected from milk to dark. That would leave white unchanged and still give you 60% dark, just with 28% white and now 12% milk. So choice B is not necessarily true and is therefore incorrect.

Choice C does not have to be true, either. You know that 33% of respondents switched to dark chocolate, but you do not know for certain that anyone switched between white and milk. As you will see with choice D...

Choice D must be true. You need a net gain of 33% moving from either white or milk to dark. And since only 28% preferred white chocolate, you can't get that 33% gain unless at the very least 5% of people changed from milk to dark.

Choice E is incorrect because, again, the minimum change is 33%. All the statements could be true if everyone who liked dark in the survey stuck with dark in the taste test, and then 33% moved to dark from milk. That case satisfies all of the facts but leaves more than half of survey responses intact, thereby invalidating choice E.

Choice D is correct.
_________________

आत्मनॊ मोक्षार्थम् जगद्धिताय च

Resource: GMATPrep RCs With Solution

GMAT Club Bot
A candy company conducted market research through a survey and a subse &nbs [#permalink] 24 Jan 2018, 00:54
Display posts from previous: Sort by

A candy company conducted market research through a survey and a subse

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

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®.