Last visit was: 15 Jul 2025, 15:27 It is currently 15 Jul 2025, 15:27
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
kannn
Joined: 26 Mar 2007
Last visit: 27 May 2014
Posts: 50
Own Kudos:
697
 [77]
Given Kudos: 8
Concentration: General Management, Leadership
Posts: 50
Kudos: 697
 [77]
6
Kudos
Add Kudos
71
Bookmarks
Bookmark this Post
Most Helpful Reply
User avatar
heygirl
Joined: 18 Oct 2010
Last visit: 25 Jun 2013
Posts: 362
Own Kudos:
210
 [16]
Given Kudos: 115
 Q39  V20
GPA: 3.5
Products:
Posts: 362
Kudos: 210
 [16]
11
Kudos
Add Kudos
5
Bookmarks
Bookmark this Post
User avatar
fluke
User avatar
Retired Moderator
Joined: 20 Dec 2010
Last visit: 24 Oct 2013
Posts: 1,104
Own Kudos:
5,007
 [5]
Given Kudos: 376
Posts: 1,104
Kudos: 5,007
 [5]
5
Kudos
Add Kudos
Bookmarks
Bookmark this Post
General Discussion
User avatar
pkmme
Joined: 11 Apr 2011
Last visit: 11 Dec 2011
Posts: 58
Own Kudos:
83
 [5]
Given Kudos: 16
Posts: 58
Kudos: 83
 [5]
3
Kudos
Add Kudos
2
Bookmarks
Bookmark this Post
The answer is C; however, bear my ignorance, my point is that as per the question "does not call John’s conclusion into question" can be interpreted as choose an option that doesn't call John's conclusion that he can cover the round trip in 80 mins into question or doesn't weakens the conclusion. Taking this into consideration, B also points out the courier vehicles are slow as they carry heavy goods and the courier vehicles take 80 mins. Thus, John going on a personal journey can definitely cover the trip in less than 80 mins. So, B also doesn't weaken the conclusion
User avatar
fluke
User avatar
Retired Moderator
Joined: 20 Dec 2010
Last visit: 24 Oct 2013
Posts: 1,104
Own Kudos:
5,007
 [7]
Given Kudos: 376
Posts: 1,104
Kudos: 5,007
 [7]
6
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
pkmme
The answer is C; however, bear my ignorance, my point is that as per the question "does not call John’s conclusion into question" can be interpreted as choose an option that doesn't call John's conclusion that he can cover the round trip in 80 mins into question or doesn't weakens the conclusion. Taking this into consideration, B also points out the courier vehicles are slow as they carry heavy goods and the courier vehicles take 80 mins. Thus, John going on a personal journey can definitely cover the trip in less than 80 mins. So, B also doesn't weaken the conclusion

If you predict that you would score approximately 750 in GMAT.

Scoring an 800 or a 700 would both be considered bad prediction. This argument is similar.

80 mph means 80 mph.
both 130 mph AND 30 mph are bad result.
User avatar
megha_2709
Joined: 05 Sep 2014
Last visit: 16 Apr 2017
Posts: 51
Own Kudos:
Given Kudos: 254
Schools: IIMB
Schools: IIMB
Posts: 51
Kudos: 14
Kudos
Add Kudos
Bookmarks
Bookmark this Post
I dont understand the question and ans choices at all :( , some one please please help what is the conclusion and how
we need to strengthen it

John thinks he should allow approx 80 mins for round trip , now does he includes loading etc in this 80 mins or excluding it
.If he exluded loading etc in this round trip , he want to take personal trip in this 80 mins only or outside of it
please please help . I dont understand the question neither how C is correct . :(

Besides this if someone could please explain the strategy for such questions.

Regards
Megha
User avatar
GyanOne
Joined: 24 Jul 2011
Last visit: 21 Apr 2025
Posts: 3,206
Own Kudos:
1,671
 [3]
Given Kudos: 33
Status: World Rank #4 MBA Admissions Consultant
Expert
Expert reply
Posts: 3,206
Kudos: 1,671
 [3]
3
Kudos
Add Kudos
Bookmarks
Bookmark this Post
As the packing, loading, and delivery time is not taken into account for calculating the average time that John uses as a reference, option (C) should be the correct choice. Option (C) refers to the packing, loading, and delivery time which is irrelevant to the calculation, and so does not call John's conclusion into question.

All of the other choices create a chance that the time taken as reference by John is not correct due to various factors.
avatar
sanjuro9
Joined: 17 Oct 2011
Last visit: 29 Oct 2014
Posts: 218
Own Kudos:
213
 [2]
Given Kudos: 36
Location: United States
Concentration: Strategy, Marketing
GMAT 1: 720 Q51 V36
GMAT 1: 720 Q51 V36
Posts: 218
Kudos: 213
 [2]
1
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
vbetanabhatla
For the last five years, the XYZ Courier Company has made regular delivery trips between Town A and Town B. The average time taken by the company’s drivers to drive the round trip between the two towns, excluding the time taken for loading, unloading, and delivery, over that period has been 80 minutes. John, a driver for XYZ, needs to make a personal trip between the two towns; he figures that he should allow approximately 80 minutes for the round trip.

Which of the following, if true, does not call John’s conclusion into question?

A) The route between Town A and Town B has been plagued by increasing congestion over the last five years, as the area's population has doubled during that time.

B) Most of XYZ’s courier vehicles are heavy trucks, for which speed limits are lower than for passenger vehicles.

C) Many of the packages carried by XYZ between Town A and Town B are large, high-security packages, for which the processes of loading, unloading, and delivery can take up to half the length of the trip itself.

D) John will make his personal trip at an hour when XYZ does not make delivery trips.

E) Before a freeway was built between Town A and Town B two years ago, the only routes between the two towns were state highways with multiple traffic lights and reduced-speed downtown zones.

John's conclusion - it should take same amount of time for his personal trip as it does for the deliveries.
Question - Which one does NOT WEAKEN John's conclusion.

A) The average time taken over the past five years has been 80 minutes. The population and congestion also has increased over the past five years. Worst case scenario - population stayed the same over 4 out of 5 years, but doubled just last year. So, say it used to take 40 minutes before and now takes about 120 minutes to deliver. Then it may weaken John's estimates that he can complete the trip in 80 minutes.

B) Delivery trucks are heavy and slow. Then they take more time than John's car to reach the destination. John would make the trip in less than 80 minutes. This strengthens his conclusion.

C) We know that the time taken for loading and unloading is not taken into consideration while calculating average delivery time for the company. This neither strengthens, nor weakens John's conclusion.

D) We don't know for sure what the consequences of this is going to be. If John is making personal trip at a busier hour, he would need more time, if not, he may complete the trip in less than 80 minutes. This can be viewed as an outside the scope option.

E) This means it used to take more than 80 minutes the first three years of the last five years, now it takes less. So, John would be able to complete the trip in less than the average time of 80 minutes.

Only (C) does NOT WEAKEN the conclusion and hence the right answer.

Hope this helps.
User avatar
nelz007
Joined: 21 Sep 2012
Last visit: 16 Aug 2020
Posts: 178
Own Kudos:
1,451
 [1]
Given Kudos: 63
Posts: 178
Kudos: 1,451
 [1]
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
For the last five years, the XYZ Courier Company has made regular delivery trips between Town A and Town B. The average time taken by the company’s drivers to drive the round trip between the two towns, excluding the time taken for loading, unloading, and delivery, over that period has been 80 minutes. John, a driver for XYZ, needs to make a personal trip between the two towns; he figures that he should allow approximately 80 minutes for the round trip.

I would have to go with C.

a)The route between Town A and Town B has been plagued by increasing congestion over the last five years, as the area's population has doubled during that time..

Its basicially saying it will take more time

b) Most of XYZ’s courier vehicles are heavy trucks, for which speed limits are lower than for passenger vehicles.
If the speedlimit is just below so basically he can travel faster and possibly complete before 80 mins

c) Many of the packages carried by XYZ between Town A and Town B are large, high-security packages, for which the processes of loading, unloading, and delivery can take up to half the length of the trip itself.. Correct Choice

d) John will make his personal trip at an hour when XYZ does not make delivery trips. weakens cos hes completing the trip faster.

e) Before a freeway was built between Town A and Town B two years ago, the only routes between the two towns were state highways with multiple traffic lights and reduced-speed downtown zones. This is saying for 3 years it was taking more time and now its lower cos the average time is 80 mins according to the passage
avatar
AKG1593
Joined: 20 Dec 2013
Last visit: 30 Mar 2024
Posts: 182
Own Kudos:
312
 [2]
Given Kudos: 35
Location: India
Posts: 182
Kudos: 312
 [2]
1
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
E is not out of scope as it implies that for three years out of five, time required for a round trip was much more than it has been for the last two years.Thus the average turns out to be 80 mins.John should lower his estimate of time required for the personal trip.He won't take 80 mins now.

Posted from my mobile device
User avatar
plumber250
Joined: 07 Nov 2012
Last visit: 21 Dec 2015
Posts: 220
Own Kudos:
951
 [2]
Given Kudos: 4
GMAT 1: 770 Q48 V48
GMAT 1: 770 Q48 V48
Posts: 220
Kudos: 951
 [2]
2
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Hi All,

Let me see if I can help clarify. The Correct answer is "C"

As a lot of you have stated, this is not a weakener, as the 'loading' etc has already been taken out of the timing equation in the paragraph. So that loading is time consuming, does not matter in the 80 min calculation.

With E though, there is a problem. The 80min estimation has been done over 5 years the question says. But E tells us that for 3 of those, the drive would have been done on a local road, but it can now be done on the freeway. So the average time now is likely to be less than the average over the past 5 years.

This means that John's journey should be estimated to take less time, hence why E does indeed weaken, and so is incorrect.

Hope this helps.

James
User avatar
sayantanc2k
Joined: 14 Dec 2013
Last visit: 09 Dec 2022
Posts: 2,395
Own Kudos:
15,463
 [1]
Given Kudos: 26
Location: Germany
Schools:
GMAT 1: 780 Q50 V47
WE:Corporate Finance (Pharmaceuticals and Biotech)
Expert
Expert reply
Schools:
GMAT 1: 780 Q50 V47
Posts: 2,395
Kudos: 15,463
 [1]
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
megha_2709
I dont understand the question and ans choices at all :( , some one please please help what is the conclusion and how
we need to strengthen it

John thinks he should allow approx 80 mins for round trip , now does he includes loading etc in this 80 mins or excluding it
.If he exluded loading etc in this round trip , he want to take personal trip in this 80 mins only or outside of it
please please help . I dont understand the question neither how C is correct . :(

Besides this if someone could please explain the strategy for such questions.

Regards
Megha

Premise: Delivery trips take 80 mins.
Conclusion: John's personal trip will also take 80 mins.

If the underlying conditions under which the 80 mins time frame is achieved by the delivery trips is different from those for John' personal trip, then the timing would be different and the conclusion would be weakened.

Therefore weakening statements would illustrate some difference between the delivery trips' driving condition and John's personal trip's driving condition. All options except C do so.
User avatar
rvgmat12
Joined: 19 Oct 2014
Last visit: 15 Jul 2025
Posts: 358
Own Kudos:
Given Kudos: 189
Location: United Arab Emirates
Products:
Kudos
Add Kudos
Bookmarks
Bookmark this Post
OE:

John assumes that his round-trip driving time between the two towns will be similar to XYZ’s average time, over the last five years, for the same round trip. Therefore, John’s conclusion will be weakened by (a) any systematic difference between John’s personal trip and XYZ’s company trips, or (b) any reason why the five-year average is not representative of the time currently required to drive between the two towns.

(A)
If this statement is true, then the five-year average commute time will not be representative of the current commute time, since the increasing congestion will have raised the current commute time to a level greater than the five-year average.

(B)
If most of XYZ’s courier vehicles are subject to speed limits lower than those for commuter automobiles, then the courier vehicles’ commute time will probably be longer than John’s commute time in his personal vehicle.

(C) Correct
The cited round-trip time specifically excludes the time required for loading, unloading, and delivery, so the length of time taken by these tasks is irrelevant to the conclusion at hand.

(D)
Since traffic patterns are highly dependent upon the time of day, the given 80-minute average cannot necessarily be expected to hold at times when XYZ does not make deliveries.

(E)
If this statement is true, then, for the first three years of the five-year period in question, the transit time between the two towns would have been much longer than that for the last two years of the period (and thus the current time). Therefore, in this case, the five-year average will not be representative of the current time.


The correct answer is C.
User avatar
djangobackend
Joined: 24 Jun 2024
Last visit: 25 Jun 2025
Posts: 101
Own Kudos:
Given Kudos: 83
Posts: 101
Kudos: 11
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Conclusion - "he figures that he should allow approximately 80 minutes for the round trip." so to weaken this, we can say that approx. time will NOT be 80 minutes, it can be both HIGHER OR LOWER than 80 minutes, I did not think that it can be both higher and lower, I thought if its lower then its strengthens, but NO, we only need to weaken the conclusion that approx. time would be 80 minutes, if time is less than 80 then it doesn't strengthen the conclusion that approx. time will be 80.

so basically, we need to say that "not be 80 means can be higher or lower" - both will weaken

A - indicates that time can be higher so weakens
B - indicates that time can be lower so weakens
C - this was already excluded in calculations, so strengthens that time will be 80 approx. - CORRECT
D - indicates that time can be both higher/lower depending on the conditions during travel hours we don't know so weakens
E - before freeway more time taken, after (condition today) freeway time is lower than before that's okay, but it doesn't impact the conclusion that approx. travel time will be 80 minutes. had it indicated that approx. travel time now is 80 due to freeway etc. then it would strengthen but right now its NO IMPACT
Moderators:
GMAT Club Verbal Expert
7356 posts
GMAT Club Verbal Expert
235 posts