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Nearly all employees of the factory who have completed their high scho

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Nearly all employees of the factory who have completed their high scho  [#permalink]

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Nearly all employees of the factory who have completed their high school diploma have earned their factory safety certificate, having easily completed the eight week training course. The high school graduates who haven't earned the certificate are ones who have evening obligations that have prevented them from taking the course. Overall, though, most of the factory workers have not earned the certificate.

If the statements above are true, which one of the following also must be true?


A. A large proportion of students with high school diplomas have evening obligations that have prevented them from taking the eight week training course.

B. No factory worker without a high school diploma has completed the course and earned the certificate.

C. Most of the workers who have earned the certificate are high school graduates.

D. A large proportion of the factory workers have not graduated from high school.

E. Most of the people who take the training course are able to earn the safety certificate.

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Originally posted by Harley1980 on 09 Aug 2015, 11:10.
Last edited by Bunuel on 04 Mar 2019, 03:18, edited 1 time in total.
Renamed the topic and edited the question.
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Re: Nearly all employees of the factory who have completed their high scho  [#permalink]

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New post 18 Aug 2015, 13:00
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Nearly all employees of the factory who have completed their high school diploma have earned their factory safety certificate, having easily completed the eight week training course. The high school graduates who haven't earned the certificate are ones who have evening obligations that have prevented them from taking the course. Overall, though, most of the factory workers have not earned the certificate.

If the statements above are true, which one of the following also must be true?

A. A large proportion of students with high school diplomas have evening obligations that have prevented them from taking the eight week training course.

B. No factory worker without a high school diploma has completed the course and earned the certificate.

C. Most of the workers who have earned the certificate are high school graduates.

D. A large proportion of the factory workers have not graduated from high school.

E. Most of the people who take the training course are able to earn the safety certificate.

Day 27 Question of the Verbal Contest: Race Against the GMAT Club Timer
Please make sure to post a brief reply without revealing your solution to enter the contest!

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Re: Nearly all employees of the factory who have completed their high scho  [#permalink]

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New post 10 Aug 2015, 05:49
Harley1980 wrote:
Nearly all employees of the factory who have completed their high school diploma have earned their factory safety certificate, having easily completed the eight week training course. The high school graduates who haven't earned the certificate are ones who have evening obligations that have prevented them from taking the course. Overall, though, most of the factory workers have not earned the certificate.

If the statements above are true, which one of the following also must be true?

A) A large proportion of students with high school diplomas have evening obligations that have prevented them from taking the eight week training course.
B) No factory worker without a high school diploma has completed the course and earned the certificate.
C) Most of the workers who have earned the certificate are high school graduates.
D) A large proportion of the factory workers have not graduated from high school.
E) Most of the people who take the training course are able to earn the safety certificate.



Is it an inference question or assumption question coz must be true is inference questions usually
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Re: Nearly all employees of the factory who have completed their high scho  [#permalink]

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New post 10 Aug 2015, 07:04
amatya wrote:
Harley1980 wrote:
Nearly all employees of the factory who have completed their high school diploma have earned their factory safety certificate, having easily completed the eight week training course. The high school graduates who haven't earned the certificate are ones who have evening obligations that have prevented them from taking the course. Overall, though, most of the factory workers have not earned the certificate.

If the statements above are true, which one of the following also must be true?

A) A large proportion of students with high school diplomas have evening obligations that have prevented them from taking the eight week training course.
B) No factory worker without a high school diploma has completed the course and earned the certificate.
C) Most of the workers who have earned the certificate are high school graduates.
D) A large proportion of the factory workers have not graduated from high school.
E) Most of the people who take the training course are able to earn the safety certificate.



Is it an inference question or assumption question coz must be true is inference questions usually


Hello amatya
"Must be true" and "Inference" are just different names for the same type of questions.

Here is good article about MBT questions
concept-article-how-to-tackle-must-be-true-or-inference-cr-162910.html
and excerpt from it:
Difference between Inference (must be true) and Assumption questions
Inference can be easily and directly deduced from the statements of the question stem while assumption will contain NEW information and can never be directly deduced from the question stem.
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Re: Nearly all employees of the factory who have completed their high scho  [#permalink]

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New post 18 Aug 2015, 22:42
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Nearly all employees of the factory who have completed their high school diploma have earned their factory safety certificate, having easily completed the eight week training course.

The high school graduates who haven't earned the certificate are ones who have evening obligations that have prevented them from taking the course.

Overall, though, most of the factory workers have not earned the certificate.

If the statements above are true, which one of the following also must be true?
(Inference question)

A. A large proportion of students with high school diplomas have evening obligations that have prevented them from taking the eight week training course. (Opposite. Nearly all diplomas completed the course. This is true of graduates.)

B. No factory worker without a high school diploma has completed the course and earned the certificate.(No. There may be at-least fewer high school graduates,who did not have evening obligations and must have completed the course and earned the certificate. This is an extreme statement which is not preferred in inference questions.)

C. Most of the workers who have earned the certificate are high school graduates. (the no of diplomas who earned certificates may be small and this sentence may be true but it cannot be inferred from above passage.)

D. A large proportion of the factory workers have not graduated from high school.(May be true but cannot be inferred.)

E. Most of the people who take the training course are able to earn the safety certificate.(This can be inferred i suppose. Not really sure.)
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Re: Nearly all employees of the factory who have completed their high scho  [#permalink]

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New post 19 Aug 2015, 04:43
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I think the best choice is D.

D. A large proportion of the factory workers have not graduated from high school. - Most high school graduates have completed, but most of the employees have not completed. Therefore, most employees did not graduated high school

E is out because...

E. Most of the people who take the training course are able to earn the safety certificate. - The question says nothing about the how well did the non high school graduates did on the training
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Re: Nearly all employees of the factory who have completed their high scho  [#permalink]

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New post 19 Aug 2015, 11:22
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Nearly all employees with high school diploma -----> earned factory certificate
Most of the employees ------> not earned the certificate
==> large number of employees not graduated from high school
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New post 20 Aug 2015, 02:26
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I have attached my version in the image. If anyone could please tell me if my reasoning is flawed or correct. It'd help me a lot :)
Thanks!
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Re: Nearly all employees of the factory who have completed their high scho  [#permalink]

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New post 22 Sep 2015, 20:11
debaratidg wrote:
I have attached my version in the image. If anyone could please tell me if my reasoning is flawed or correct. It'd help me a lot :)
Thanks!


I made the same image and knew that D is right.

But why is E wrong ?
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Re: Nearly all employees of the factory who have completed their high scho  [#permalink]

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New post 23 Sep 2015, 06:12
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rukna wrote:
debaratidg wrote:
I have attached my version in the image. If anyone could please tell me if my reasoning is flawed or correct. It'd help me a lot :)
Thanks!


I made the same image and knew that D is right.

But why is E wrong ?


Hello rukna

E is wrong because it says: "Most of the people who take the training course are able to earn the safety certificate."
From the argument we know that "most of the factory workers have not earned the certificate."
But we don't know whether they took this course or not. If they took this course then answer E is correct if not then answer E is incorrect.

This is inference question so we should pick answer that is 100% correct and answer D has several possibilities that's why it wrong.
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Re: Nearly all employees of the factory who have completed their high scho  [#permalink]

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New post 10 Nov 2015, 15:33
My explanation:

Nearly all employees of the factory who have completed their high school diploma have earned their factory safety certificate, having easily completed the eight week training course. The high school graduates who haven't earned the certificate are ones who have evening obligations that have prevented them from taking the course. Overall, though, most of the factory workers have not earned the certificate.

If the statements above are true, which one of the following also must be true?

A) A large proportion of students with high school diplomas have evening obligations that have prevented them from taking the eight week training course. - "high school diploma" not discussed within scope having evening obligations
B) No factory worker without a high school diploma has completed the course and earned the certificate. - "no" is again exggearted statement
C) Most of the workers who have earned the certificate are high school graduates. - 180 statement ie; MOST of workers did not earn certificate
D) A large proportion of the factory workers have not graduated from high school.
E) Most of the people who take the training course are able to earn the safety certificate. - Generalized statement by extending the stimulus to "people"
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Re: Nearly all employees of the factory who have completed their high scho  [#permalink]

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New post 11 Nov 2015, 18:05
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A=factory workers
B=high school diploma
C=safety certificate
O= obligation

Most A who had B has C.
If one has no C the he has O
Most A has no C.


which means Most A have O or Most A does not have B

Option D

Sorry if it it is a dumb logic. :P
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Re: Nearly all employees of the factory who have completed their high scho  [#permalink]

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New post 11 Mar 2016, 20:48
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Harley1980 wrote:
Nearly all employees of the factory who have completed their high school diploma have earned their factory safety certificate, having easily completed the eight week training course. The high school graduates who haven't earned the certificate are ones who have evening obligations that have prevented them from taking the course. Overall, though, most of the factory workers have not earned the certificate.

If the statements above are true, which one of the following also must be true?

A) A large proportion of students with high school diplomas have evening obligations that have prevented them from taking the eight week training course.
B) No factory worker without a high school diploma has completed the course and earned the certificate.
C) Most of the workers who have earned the certificate are high school graduates.
D) A large proportion of the factory workers have not graduated from high school.
E) Most of the people who take the training course are able to earn the safety certificate.


Picked D, as it is the most reasonable one..
A. no. we know that the majority of those with diplomas - completed the course and got the certificate.
B. we are told only about those who got diploma..we cannot generalize about those who did not...suppose that 20 people are with diploma. 19 completed and got certificate. 80 no diploma. 2 completed. total we have 21 completed. still most of the workers did not earn the certificate. since it is possible - b is out.
C. suppose we have 20 workers with diploma. 19 earned the certificate. 80 are without diploma. 20 earned certificate. overall - 39 earned certificate, but the majority of workers did not. out
D. since overall - most factory workers have not earned the certificate, we can conclude that:
at least 51 workers out of 100 did not get the certificate.
suppose 50 graduated high school. 50 not. out of first 50 - 48 passed. out of other 50 - 1 passed. so overall majority failed - but we have 50/50.
E. we do not know about those who did not graduated from HS. so no.

any expert can comment on where my logic failed while analyzing D?
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Re: Nearly all employees of the factory who have completed their high scho  [#permalink]

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New post 28 Apr 2017, 11:37
My 2 cents:
I selected C when i attempted this question, but here is my explanation as to why D is correct:

Nearly all employees of the factory who have completed their high school diploma have earned their factory safety certificate, having easily completed the eight week training course.
The high school graduates who haven't earned the certificate are ones who have evening obligations that have prevented them from taking the course. Overall, though, most of the
factory workers have not earned the certificate.

If the statements above are true, which one of the following also must be true?
A) A large proportion of students with high school diplomas have evening obligations that have prevented them from taking the eight week training course.
B) No factory worker without a high school diploma has completed the course and earned the certificate.
C) Most of the workers who have earned the certificate are high school graduates.
D) A large proportion of the factory workers have not graduated from high school.
E) Most of the people who take the training course are able to earn the safety certificate.

Premise-1:
# of HS graduates = 100
Most of HSD have earned the safety certificate = 90
Remaining HSD who haven't earned SC are those who have evening obligations = 10

Premise-2: Most of the factory workers have not earned the certificate.
Let,Total # of factory worker = 1000
HSD = 100
Remaining without HSD = 900
Some of non-HSD with SC = 150
non-HSD without SC = 750
Thus, PLEASE NOTE that Premise-2 makes it IMPOSSIBLE for # of workers with HSD > # of non-HSD workers BECAUSE most of HSD workers have earned SC and most of the workers haven't.

C) Most of the workers who have earned the certificate are high school graduates.
This is possible BUT can't be infered, as in our example even though majority of HS graduates have SC but still it is < # of non-HSD with SC. So INCORRECT.
I couldn't think of this case while trying to solve this problem.

D) A large proportion of the factory workers have not graduated from high school.
BECAUSE
P-2: Most of the factory workers have not earned the certificate. &
Nearly all employees of the factory who have completed their high school diploma have earned their factory safety certificate
# of HSD holders < # of non-HSD and # non-HSD is the biggest chunk of work force. Also big portion of non-HSD hasn't earned the SC.

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Re: Nearly all employees of the factory who have completed their high scho  [#permalink]

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New post 28 Apr 2017, 11:38
My 2 cents:
I selected C when i attempted this question, but here is my explanation as to why D is correct:

Nearly all employees of the factory who have completed their high school diploma have earned their factory safety certificate, having easily completed the eight week training course.
The high school graduates who haven't earned the certificate are ones who have evening obligations that have prevented them from taking the course. Overall, though, most of the
factory workers have not earned the certificate.

If the statements above are true, which one of the following also must be true?
A) A large proportion of students with high school diplomas have evening obligations that have prevented them from taking the eight week training course.
B) No factory worker without a high school diploma has completed the course and earned the certificate.
C) Most of the workers who have earned the certificate are high school graduates.
D) A large proportion of the factory workers have not graduated from high school.
E) Most of the people who take the training course are able to earn the safety certificate.

Premise-1:
# of HS graduates = 100
Most of HSD have earned the safety certificate = 90
Remaining HSD who haven't earned SC are those who have evening obligations = 10

Premise-2: Most of the factory workers have not earned the certificate.
Let,Total # of factory worker = 1000
HSD = 100
Remaining without HSD = 900
Some of non-HSD with SC = 150
non-HSD without SC = 750
Thus, PLEASE NOTE that Premise-2 makes it IMPOSSIBLE for # of workers with HSD > # of non-HSD workers BECAUSE most of HSD workers have earned SC and most of the workers haven't.

C) Most of the workers who have earned the certificate are high school graduates.
This is possible BUT can't be infered, as in our example even though majority of HS graduates have SC but still it is < # of non-HSD with SC. So INCORRECT.
I couldn't think of this case while trying to solve this problem.

D) A large proportion of the factory workers have not graduated from high school.
BECAUSE
P-2: Most of the factory workers have not earned the certificate. &
Nearly all employees of the factory who have completed their high school diploma have earned their factory safety certificate
# of HSD holders < # of non-HSD and # non-HSD is the biggest chunk of work force. Also big portion of non-HSD hasn't earned the SC.

If you like, kudo!!!
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Re: Nearly all employees of the factory who have completed their high scho  [#permalink]

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New post 25 May 2018, 21:39

Official Explanation Magoosh:



The credited answer is (D). If most factory workers with high school degrees have completed the training, then most of the factory workers who haven't completed the training must be folks without high school degrees. Since the factory workers who haven't completed the training in the vast majority, and since factory workers with high school degrees can only account for a very small number of these, then most of the factory workers must not have high school degrees.

We don't know how many factory workers with high school degrees have evening obligations. We know that the factory workers with high school degrees who haven't completed the training have evening obligations that prevent them from completing it, but among the factory workers with high school degrees who have completed the training, we don't know what proportion has evening obligations, and how the size of this group might compare to the number of the factory workers with high school degrees who haven't completed the training. Choice (A) is incorrect.

As explained above, the information lead us to deduce that many factory workers without high school degrees haven't completed the training course, but that does mean that none have. Choice (B) is too extreme, and it is incorrect.

We don't know the relative proportions of worker with or without high school degrees; as discuss above, we have grounds to suspect that the latter is a larger group. We know that many of the factory workers with high school degrees have completed the training and have earned the certificate, but we have no idea what proportion of the factory workers without high school degrees have done so, and how the number of this latter group compares to the former group. We have no way to know which is greater. Choice (C) is incorrect.

The information suggests that, among high school graduates, most of the folks who took the course were able to earn the certificate with little difficulty. Is this generally the case? Is it the case for folks who weren't able, for whatever reason, to complete their high school degree? We don't know. The prompt provides no information on this point. Choice (E) is incorrect.
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Re: Nearly all employees of the factory who have completed their high scho  [#permalink]

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New post 05 Oct 2018, 19:55
Nearly all employees of the factory who have completed their high school diploma have earned their factory safety certificate, having easily completed the eight week training course. The high school graduates who haven't earned the certificate are ones who have evening obligations that have prevented them from taking the course. Overall, though, most of the factory workers have not earned the certificate.

If the statements above are true, which one of the following also must be true?
---------------------
After prethinking we simply have to look for answer D.
But if we do not make prethinking, we will check the options.

A) A large proportion of students with high school diplomas have evening obligations that have prevented them from taking the eight week training course.
Not true. Look at "Nearly all employees of the factory who have completed their high school diploma have earned their factory safety certificate"

B) No factory worker without a high school diploma has completed the course and earned the certificate.
We do not know it, nothing is said in a passage

C) Most of the workers who have earned the certificate are high school graduates.
We do not know it, nothing is said in a passage

D) A large proportion of the factory workers have not graduated from high school.
Yes.
1. Nearly all employees of the factory who have completed their high school diploma have earned their factory safety certificate ---> almost all high school diploma workers got the certificate (almost 100%)
2. Overall, though, most of the factory workers have not earned the certificate. -----> there are fewer high diploma workers than non high diploma workers


E) Most of the people who take the training course are able to earn the safety certificate.
It is irrelevant
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Re: Nearly all employees of the factory who have completed their high scho  [#permalink]

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New post 06 Feb 2019, 00:45
Let’s say the factory has 1000 workers. 800 has high school diplomas, and 200 not. 780 of the 800 have evening obligations, so only 20 get safety certificates. 10 of the 200 get safety certificates. Then we have 30 workers who get safety certificates. Of course, 30 is not most. This situation is against choice D.

Am I wrong?
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Re: Nearly all employees of the factory who have completed their high scho   [#permalink] 06 Feb 2019, 00:45
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