Last visit was: 19 Nov 2025, 17:11 It is currently 19 Nov 2025, 17:11
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
User avatar
vikrantgulia
Joined: 18 Oct 2013
Last visit: 23 Oct 2022
Posts: 62
Own Kudos:
318
 [85]
Given Kudos: 36
Location: India
Concentration: Technology, Finance
GMAT 1: 580 Q48 V21
GMAT 2: 530 Q49 V13
GMAT 3: 590 Q49 V21
WE:Information Technology (Computer Software)
7
Kudos
Add Kudos
78
Bookmarks
Bookmark this Post
Most Helpful Reply
User avatar
KarishmaB
Joined: 16 Oct 2010
Last visit: 19 Nov 2025
Posts: 16,267
Own Kudos:
77,001
 [37]
Given Kudos: 482
Location: Pune, India
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 16,267
Kudos: 77,001
 [37]
23
Kudos
Add Kudos
14
Bookmarks
Bookmark this Post
User avatar
Rock750
Joined: 25 Oct 2012
Last visit: 20 Sep 2016
Posts: 185
Own Kudos:
1,419
 [7]
Given Kudos: 85
Status:Final Lap
Concentration: General Management, Entrepreneurship
GPA: 3.54
WE:Project Management (Retail Banking)
Posts: 185
Kudos: 1,419
 [7]
6
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
General Discussion
avatar
dolphinitida
Joined: 03 May 2014
Last visit: 05 Mar 2015
Posts: 1
Posts: 1
Kudos: 0
Kudos
Add Kudos
Bookmarks
Bookmark this Post
For III - Since the data is for 11 consecutive years, why can't you consider year 6 (1990) as the mean? If you do, the annual income appears to be right under $40,000.
User avatar
thangvietname
Joined: 09 Jun 2010
Last visit: 28 Jun 2017
Posts: 522
Own Kudos:
Given Kudos: 916
Posts: 522
Kudos: 561
Kudos
Add Kudos
Bookmarks
Bookmark this Post
this question require us to approximate.
not easy. but if you practice often, it would be easy
User avatar
SamuelWitwicky
Joined: 13 Jul 2015
Last visit: 04 Aug 2022
Posts: 79
Own Kudos:
Given Kudos: 41
Location: Singapore
Schools: LBS '21 (M)
GMAT 1: 730 Q50 V39
WE:Operations (Finance: Investment Banking)
Schools: LBS '21 (M)
GMAT 1: 730 Q50 V39
Posts: 79
Kudos: 45
Kudos
Add Kudos
Bookmarks
Bookmark this Post
vikrantgulia
Attachment:
GMAT.png
Which of the following statements can be inferred from the data above?

I. The Klein family's annual income more than doubled from 1985 to 1995.
II. The Klein family's annual income increased by a greater amount from 1985 to 1990 than from 1990 to 1995.
III. The Klein family's average (arithmetic mean) annual income for the period shown was greater than $40,000.

A. I only
B. II only
C. I and III only
D. II and III only
E. I, II, and III

Hi
This is an GMAT Prep Question.Please let me know the correct answer and why it correct?
Moreover, why We cannot infer II from the data above?

Bunuel, could you comment if this is an actual GMATPrep Quant question or an IR question?
User avatar
EMPOWERgmatRichC
User avatar
Major Poster
Joined: 19 Dec 2014
Last visit: 31 Dec 2023
Posts: 21,784
Own Kudos:
Given Kudos: 450
Status:GMAT Assassin/Co-Founder
Affiliations: EMPOWERgmat
Location: United States (CA)
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Expert
Expert reply
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Posts: 21,784
Kudos: 12,807
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Hi SamuelWitwicky,

Most Test Takers see 1 question in the Quant section that involves a complex-looking chart, graph or table; the prompt is usually more complex than an 'average' question and takes the better part of 3 minutes to solve. Thus, this type of question COULD show up in your Quant section (but you won't see many of them).

As complex as the prompt looks, very little actual math is required to solve it. Some general estimation and pattern-matching will get you the correct answer.

GMAT assassins aren't born, they're made,
Rich
User avatar
SamuelWitwicky
Joined: 13 Jul 2015
Last visit: 04 Aug 2022
Posts: 79
Own Kudos:
Given Kudos: 41
Location: Singapore
Schools: LBS '21 (M)
GMAT 1: 730 Q50 V39
WE:Operations (Finance: Investment Banking)
Schools: LBS '21 (M)
GMAT 1: 730 Q50 V39
Posts: 79
Kudos: 45
Kudos
Add Kudos
Bookmarks
Bookmark this Post
EMPOWERgmatRichC
Hi SamuelWitwicky,

Most Test Takers see 1 question in the Quant section that involves a complex-looking chart, graph or table; the prompt is usually more complex than an 'average' question and takes the better part of 3 minutes to solve. Thus, this type of question COULD show up in your Quant section (but you won't see many of them).

As complex as the prompt looks, very little actual math is required to solve it. Some general estimation and pattern-matching will get you the correct answer.

GMAT assassins aren't born, they're made,
Rich

Hey thanks for the reply. ok if that is so, i'd like to understand the wording of the question so that I don't make the same mistake again. The question stem states, which of the following can be inferred from the graph right?

I feel statement II can be inferred to be wrong from the graph.

And this is exactly how IR always asks the questions. Can the following be inferred? Yes or No.
User avatar
KarishmaB
Joined: 16 Oct 2010
Last visit: 19 Nov 2025
Posts: 16,267
Own Kudos:
77,001
 [5]
Given Kudos: 482
Location: Pune, India
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 16,267
Kudos: 77,001
 [5]
3
Kudos
Add Kudos
2
Bookmarks
Bookmark this Post
SamuelWitwicky

I feel statement II can be inferred to be wrong from the graph.

And this is exactly how IR always asks the questions. Can the following be inferred? Yes or No.

There is a difference:

Can you infer that: The Klein family's annual income increased by a greater amount from 1985 to 1990 than from 1990 to 1995.
If this is not true, you say that you cannot infer this from the graph. This is a statement and to be inferred, it needs to be true only.

On the other hand: Did the Klein family's annual income increase by a greater amount from 1985 to 1990 than from 1990 to 1995?
When it is a question, you can answer with a Yes or No. Both answers are acceptable. The only answer not acceptable is may be. (your basic DS principle)

This question is asking about a statement and whether you can infer that. If the statement is correct, only then you can infer it.
User avatar
SamuelWitwicky
Joined: 13 Jul 2015
Last visit: 04 Aug 2022
Posts: 79
Own Kudos:
Given Kudos: 41
Location: Singapore
Schools: LBS '21 (M)
GMAT 1: 730 Q50 V39
WE:Operations (Finance: Investment Banking)
Schools: LBS '21 (M)
GMAT 1: 730 Q50 V39
Posts: 79
Kudos: 45
Kudos
Add Kudos
Bookmarks
Bookmark this Post
VeritasPrepKarishma
SamuelWitwicky

I feel statement II can be inferred to be wrong from the graph.

And this is exactly how IR always asks the questions. Can the following be inferred? Yes or No.

There is a difference:

Can you infer that: The Klein family's annual income increased by a greater amount from 1985 to 1990 than from 1990 to 1995.
If this is not true, you say that you cannot infer this from the graph. This is a statement and to be inferred, it needs to be true only.

On the other hand: Did the Klein family's annual income increase by a greater amount from 1985 to 1990 than from 1990 to 1995?
When it is a question, you can answer with a Yes or No. Both answers are acceptable. The only answer not acceptable is may be. (your basic DS principle)

This question is asking about a statement and whether you can infer that. If the statement is correct, only then you can infer it.

ok got it! thanks a lot Karishma :)
User avatar
NoHalfMeasures
User avatar
Retired Moderator
Joined: 29 Oct 2013
Last visit: 11 Jul 2023
Posts: 220
Own Kudos:
Given Kudos: 204
Concentration: Finance
GPA: 3.7
WE:Corporate Finance (Retail Banking)
Posts: 220
Kudos: 2,480
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Rock750
vikrantgulia

Ok, lets see:
(25 + 25 + 25 + 35 + 35 + 40 + 40 + 55 + 60 + 60 +60) / 11 = 41,8 SO , that is true .

How did you take last three numbers as 60. they look more close to 65 to me. Deciding the xact values make me waste a lot of time on these questions. Any help will be much appreciated. Thanks
User avatar
KarishmaB
Joined: 16 Oct 2010
Last visit: 19 Nov 2025
Posts: 16,267
Own Kudos:
77,001
 [1]
Given Kudos: 482
Location: Pune, India
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 16,267
Kudos: 77,001
 [1]
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
NoHalfMeasures
Rock750
vikrantgulia

Ok, lets see:
(25 + 25 + 25 + 35 + 35 + 40 + 40 + 55 + 60 + 60 +60) / 11 = 41,8 SO , that is true .

How did you take last three numbers as 60. they look more close to 65 to me. Deciding the xact values make me waste a lot of time on these questions. Any help will be much appreciated. Thanks

Use the deviation method I have discussed above.

If you do want to take values, take approximate values:
25, 26, 26, 35, 36, 38, 38, 56, 63, 63, 63

Mind you, the average you will get will not be very close to 40 so a few points here and there on your approximation will make no difference.
avatar
sarathvr
Joined: 29 Nov 2015
Last visit: 14 Jan 2016
Posts: 11
Own Kudos:
Given Kudos: 43
Posts: 11
Kudos: 18
Kudos
Add Kudos
Bookmarks
Bookmark this Post
VeritasPrepKarishma
SamuelWitwicky

I feel statement II can be inferred to be wrong from the graph.

And this is exactly how IR always asks the questions. Can the following be inferred? Yes or No.

There is a difference:

Can you infer that: The Klein family's annual income increased by a greater amount from 1985 to 1990 than from 1990 to 1995.
If this is not true, you say that you cannot infer this from the graph. This is a statement and to be inferred, it needs to be true only.

On the other hand: Did the Klein family's annual income increase by a greater amount from 1985 to 1990 than from 1990 to 1995?
When it is a question, you can answer with a Yes or No. Both answers are acceptable. The only answer not acceptable is may be. (your basic DS principle)

This question is asking about a statement and whether you can infer that. If the statement is correct, only then you can infer it.

So just to be sure, in PS and DS, when the question asks 'can you infer...' it means can you get an exact value of this (true/false, yes/no, etc)? But in IR, when the question asks 'can you infer...' it means is there sufficient information provided in the paragraphs and tables for you to ARRIVE at an answer or DEDUCE an answer?
User avatar
KarishmaB
Joined: 16 Oct 2010
Last visit: 19 Nov 2025
Posts: 16,267
Own Kudos:
77,001
 [2]
Given Kudos: 482
Location: Pune, India
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 16,267
Kudos: 77,001
 [2]
2
Kudos
Add Kudos
Bookmarks
Bookmark this Post
sarathvr
VeritasPrepKarishma
SamuelWitwicky

I feel statement II can be inferred to be wrong from the graph.

And this is exactly how IR always asks the questions. Can the following be inferred? Yes or No.

There is a difference:

Can you infer that: The Klein family's annual income increased by a greater amount from 1985 to 1990 than from 1990 to 1995.
If this is not true, you say that you cannot infer this from the graph. This is a statement and to be inferred, it needs to be true only.

On the other hand: Did the Klein family's annual income increase by a greater amount from 1985 to 1990 than from 1990 to 1995?
When it is a question, you can answer with a Yes or No. Both answers are acceptable. The only answer not acceptable is may be. (your basic DS principle)

This question is asking about a statement and whether you can infer that. If the statement is correct, only then you can infer it.

So just to be sure, in PS and DS, when the question asks 'can you infer...' it means can you get an exact value of this (true/false, yes/no, etc)? But in IR, when the question asks 'can you infer...' it means is there sufficient information provided in the paragraphs and tables for you to ARRIVE at an answer or DEDUCE an answer?


No, the difference does not lie in whether the question is asked in PS/DS or IR. The difference lies in the way the question is asked.

Can you infer that:
The Klein family's annual income increased by a greater amount from 1985 to 1990 than from 1990 to 1995.

This is a statement. To infer it, it needs to be true. If this is not true, you say that you cannot infer this from the graph.

On the other hand:
Did the Klein family's annual income increase by a greater amount from 1985 to 1990 than from 1990 to 1995?

When it is a question, you can answer with a Yes or No. Both answers are acceptable. The only answer not acceptable is may be.
User avatar
KarishmaB
Joined: 16 Oct 2010
Last visit: 19 Nov 2025
Posts: 16,267
Own Kudos:
Given Kudos: 482
Location: Pune, India
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 16,267
Kudos: 77,001
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Responding to a pm:
Quote:

For this particular question (URL link above), I chose Option E as I can infer all the statements, two of which(I and III) are right and one (II) is false.
Kindly explain where am I going wrong?

You cannot infer statement II. Here is why:

Can you infer that: The Klein family's annual income increased by a greater amount from 1985 to 1990 than from 1990 to 1995.
If this is not true, you say that you cannot infer this from the graph. This is a statement and to be inferred, it needs to be true ONLY.

On the other hand: Did the Klein family's annual income increase by a greater amount from 1985 to 1990 than from 1990 to 1995?
When it is a question, you can answer with a Yes or No. Both answers are acceptable. The only answer not acceptable is may be. (your basic DS principle)

This question is asking about a statement and whether you can infer that. If the statement is correct, only then you can infer it.
avatar
DeD
Joined: 30 Aug 2016
Last visit: 23 Jul 2024
Posts: 3
Own Kudos:
9
 [1]
Given Kudos: 92
Location: Italy
GMAT 1: 700 Q47 V41
GPA: 3.83
GMAT 1: 700 Q47 V41
Posts: 3
Kudos: 9
 [1]
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Just a quick note

Once you realized that I. must be true and II. must not, then you can ignore statement III. and directly mark C: C is the only answer in which I. is true and II. is not!
User avatar
idivya
Joined: 05 Oct 2016
Last visit: 19 Sep 2017
Posts: 4
Own Kudos:
Given Kudos: 54
Location: India
Schools: NUS '20
GMAT 1: 600 Q50 V30
GPA: 3.4
Schools: NUS '20
GMAT 1: 600 Q50 V30
Posts: 4
Kudos: 3
Kudos
Add Kudos
Bookmarks
Bookmark this Post
VeritasPrepKarishma
dolphinitida
For III - Since the data is for 11 consecutive years, why can't you consider year 6 (1990) as the mean? If you do, the annual income appears to be right under $40,000.

What you are talking about is the median. Year 6 will give you the median income. The mean needn't lie at the middle value.
Say, for a set of numbers 4, 5, 5, 6, 7, 20, 22, mean will not be 6 (the middle value). Median will be 6 but mean will be much higher.

Another way to analyze statement III is this:

First 3 points are at most 15000 less than 40,000.
Next 4 points are almost 40,000 each.
The next point is at least 15,000 more than 40,000
The next 3 points are at least 20,000 more than 40,000.

So overall, the distance of the points higher than 40,000 is more than the distance of the points lower than 40,000. This is just your deviation concept applied visually.

For more on deviation, check: https://www.gmatclub.com/forum/veritas-prep-resource-links-no-longer-available-399979.html#/2012/05 ... eviations/

this saves a lot of time. i kept addiing all the values and calculating average, eating lot of time
thanks for the post
User avatar
AD2GMAT
Joined: 30 Jul 2014
Last visit: 30 Jan 2023
Posts: 87
Own Kudos:
Given Kudos: 107
Status:MBA Completed
Affiliations: IIM
Products:
Posts: 87
Kudos: 104
Kudos
Add Kudos
Bookmarks
Bookmark this Post
I did a calculation mistake while evaluating statement 3 - marked answer A as option. Learning: I should not do calculation in mind, rather I should actually write calculations in a piece of paper.
User avatar
Leo8
Joined: 23 May 2017
Last visit: 11 Sep 2020
Posts: 184
Own Kudos:
390
 [5]
Given Kudos: 9
Concentration: Finance, Accounting
WE:Programming (Energy)
Posts: 184
Kudos: 390
 [5]
3
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
11 data points : Income in 1000
85 -> 25
86 -> 26
87 -> 26
88 -> 35
89 -> 40
90 -> 44
91 -> 44
92 -> 58
93 -> 64
94 -> 64
95 -> 64


I. The Klein family's annual income more than doubled from 1985 to 1995.
Income in 95 = 64 which is more than twice of 25 ( income from 85 ) - True : B, D are out


II. The Klein family's annual income increased by a greater amount from 1985 to 1990 than from 1990 to 1995.

90 - 85 = 44 - 25 = 19
95 - 90 = 64 - 44 = 20

so 19 > 20 - No So E is out


III. The Klein family's average (arithmetic mean) annual income for the period shown was greater than $40,000.

to find average - Let's divide data points by 11 directly rather than summing and then dividing by 11
\(\frac{25}{11}\) + \(\frac{26}{11}\) + \(\frac{26}{11}\) + \(\frac{35}{11}\) + \(\frac{40}{11}\) +
\(\frac{44}{11}\) + \(\frac{44}{11}\) + \(\frac{58}{11}\) + \(\frac{64}{11}\) + \(\frac{64}{11}\) +
\(\frac{64}{11}\)

= 2 + 2 + 2 + 3 + 3 + 4 + 4 + 5 + 5 + 5 + 5 [ just taking integer values ]
= 8 + 10 + 9 + 15
= 18 + 24
= 42 > 40 hence answer = C


A. I only
B. II only
C. I and III only
D. II and III only
E. I, II, and III
User avatar
bumpbot
User avatar
Non-Human User
Joined: 09 Sep 2013
Last visit: 04 Jan 2021
Posts: 38,589
Own Kudos:
Posts: 38,589
Kudos: 1,079
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Moderators:
Math Expert
105390 posts
Tuck School Moderator
805 posts