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Recent estimates predict that between 1982 and 1995 the

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Re: Recent estimates predict that between 1982 and 1995 the  [#permalink]

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New post 28 Oct 2017, 10:34
SudiptoGmat wrote:
Recent estimates predict that between 1982 and 1995 the greatest increase in the number of people employed will be in the category of low-paying service occupations. This category, however, will not increase its share of total employment, whereas the category of high-paying service occupations will increase its share.

If the estimates above are accurate, which of the following conclusions can be drawn?
(A) In 1982 more people were working in low-paying service occupations than were working in high-paying service occupations.
(B) In 1995 more people will be working in high-paying service occupations than will be working in low-paying service occupations.
(C) Nonservice occupations will account for the same share of total employment in 1995 as in 1982.
(D) Many of the people who were working in low-paying service occupations in 1982 will be working in high-paying service occupations by 1995.
(E) The rate of growth for low-paying service occupations will be greater than the overall rate of employment growth between 1982 and 1995.

What exactly is the correct answer? I chose A, which seemed perfectly logical, but here the answer seems to be B. I wonder if it is correct. Please help!
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Re: Recent estimates predict that between 1982 and 1995 the  [#permalink]

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New post 22 Nov 2017, 03:33
mikemcgarry wrote:
Poorvasha wrote:
Hi mikemcgarry

Below is my interpretation of the problem:

1982 Low= 40, High= 34, Others=26 .
Percentage of low is 40% and of high is %34.
1995- Low 80, High 70, Others 50. total 200. Percentage of low = 40% (constant). % of high 35% (higher).
So, in 1982 more people were working in low-paying service occupations than were working in high-paying service occupations..
Whereas in 1995, number of high is less than the number of low ones.
Basis this I am obtaining A.

Can you please help me identify the flaw in my reasoning ?

Thanks :)

Dear Poorvasha,

I'm happy to respond. :-)

My friend, this is a deeply flawed question. In trying to create a tricky must-be-true questions, the author created a question with more possibilities that he himself was able to imagine. In fact, NOTHING must be true, given this scenario, and a few of the answers could be true. This is a completely train wreck of a question and should be ignored.

Don't automatically assume that, simply because some company says "this is a high quality question," that it actually is. Many many GMAT verbal practice questions are pure trash. You have to be very discerning about the source of the question. Read reviews and testimonials. Caveat emptor.

Here's a high quality practice question:
FANTOD programming

Does all this make sense?
Mike :-)



Thank you Mike :). Got the correct answer (C) for the question on FANTOD Programming.
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Re: Recent estimates predict that between 1982 and 1995 the  [#permalink]

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New post 23 Nov 2017, 03:43
GMATPill wrote:
You'll need to visualize your answer for this one.
You can identify this question as the same as an "inference" question - some conclusion is stated and we need information in the passage to support it.

Think of the pie to get this one.

"Low" will NOT increase its share of total employment. So let's say that it's share of the pie stays the same, but the overall pie gets bigger.

So, "Low" might have 15% market share. And in 1995, it STILL has 15%...though the overall pie got bigger.

"High" WILL increase its share of total employment. It can either have more or less than the 15% market share that "Low" has.

1) If <15%, let's say 5%. If 5% and "High" increased to 8%, that gain CAN be less than the gain that LOW experiences. While LOW's % market share stays the same, there is an increase in the overall pie and so LOW will increase. HIGH staying at 5% will also increase but it will increase a very small amount. Its share % can increase to 8%, and the total quantity increased can still be smaller than LOW's increase. See example below.

2) If >15%, let's say 25%. If 25% and "High" increased to 35%, that gain is going to be BIGGER than LOW's gain....conflicts with information in the passage


With Numbers:

Assume Total Employment: 100 ---> 200
1982: LOW 15, HIGH 5.
LOW (15/100 = 15%); HIGH (5/100 = 5%)

1995: LOW 30, HIGH 16
LOW (30/200 = 15%); HIGH (16/200 = 8%)

Here, LOW's % stayed the same, but HIGH's % increased. This is consistent with information provided.
But now, LOW's overall increase was 15 (30-15) while HIGH's increase was only 11 (16-5)

LOW must have started off at a higher base.



according to the above explanation, the answer must be A
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New post 29 Dec 2017, 09:54
Can someone mathematically explain, why is option B correct?
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Re: Recent estimates predict that between 1982 and 1995 the  [#permalink]

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New post 29 Dec 2017, 19:23
Khuranasup wrote:
Can someone mathematically explain, why is option B correct?

Dear Khuranasup

Please see my post of Nov 17, 2017.

Mike :-)
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Re: Recent estimates predict that between 1982 and 1995 the  [#permalink]

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New post 12 Jan 2018, 15:00
Hi, Please reconside the OA.
It should be A IMO, also detailed explainations in comments also concur with A.

COnsider a scenario:
1982-
Total=100, Low=15, High=5
1995-
Total=200, low=30, High=11
Share of high-Increased but the increase in lesser than increase in Low.
Share of low is the same.
This proves that it is not necessary to have more people workinh highpaying ser than in low paying ser.

Thanks in advance!
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Re: Recent estimates predict that between 1982 and 1995 the  [#permalink]

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New post 26 Jan 2018, 07:44
C,D and E are eliminated straightaway..Its between A and B....I chose Option B
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New post 31 Jan 2018, 00:37
Please explain why option B is correct ? I marked D as an answer.
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Re: Recent estimates predict that between 1982 and 1995 the  [#permalink]

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New post 03 Feb 2018, 02:40
SudiptoGmat wrote:
Recent estimates predict that between 1982 and 1995 the greatest increase in the number of people employed will be in the category of low-paying service occupations. This category, however, will not increase its share of total employment, whereas the category of high-paying service occupations will increase its share.

If the estimates above are accurate, which of the following conclusions can be drawn?
(A) In 1982 more people were working in low-paying service occupations than were working in high-paying service occupations.
(B) In 1995 more people will be working in high-paying service occupations than will be working in low-paying service occupations.
(C) Nonservice occupations will account for the same share of total employment in 1995 as in 1982.
(D) Many of the people who were working in low-paying service occupations in 1982 will be working in high-paying service occupations by 1995.
(E) The rate of growth for low-paying service occupations will be greater than the overall rate of employment growth between 1982 and 1995.


[b]Suppose LP-low paying job, HP-High paying Job

.....................1982.......... 1995
No. Of LP.......... x................3x (i took it 3x and other 2y because rate of growth of LP is higher than HP)
no. Of HP..........y.................2y
total...............x+y...........3x+2y

stem has given two conditions
1. x/(x+y) <= 3x/(3x+2y)
2. 2y/(3x+2y) > y/(x+y)

and these two conditions are satisfied only when B is true. so answer is B
try putting x=1,1 and y=6, 8
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New post 03 Feb 2018, 02:50
vaibranjan wrote:
Please explain why option B is correct ? I marked D as an answer.

[b]Suppose LP-low paying job, HP-High paying Job

.....................1982.......... 1995
No. Of LP.......... x................3x (i took it 3x and other 2y because rate of growth of LP is higher than HP)
no. Of HP..........y.................2y
total...............x+y...........3x+2y

stem has given two conditions
1. x/(x+y) <= 3x/(3x+2y)
2. 2y/(3x+2y) > y/(x+y)

and these two conditions are satisfied only when B is true. so answer is B
try putting x=1,1 and y=6, 8
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Re: Recent estimates predict that between 1982 and 1995 the  [#permalink]

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New post 08 Dec 2018, 01:34
GMATPill wrote:
LOW must have started off at a higher base.


Shouldn't the answer be A then?
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Re: Recent estimates predict that between 1982 and 1995 the  [#permalink]

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New post 27 Mar 2019, 18:59
VeritasKarishma GMATNinja generis

How to crack such mathematical based reasoning questions efficiently??

Please help.
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New post 14 Apr 2019, 09:00
teaserbae wrote:
nightblade354 gmat1393 please change the answer to A
B is incorrect as explained in the post above to mine


teaserbae

Thanks for reporting.I have corrected the OA
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Re: Recent estimates predict that between 1982 and 1995 the  [#permalink]

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New post 22 Apr 2019, 05:56
Can anyone please explain why "D" is wrong. i understand that why A is the correct but i am unable to eliminate "D".

Can anyone please explain on what ground we can eliminate option "D".

Thanks in advance :)
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Re: Recent estimates predict that between 1982 and 1995 the  [#permalink]

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New post 14 May 2019, 05:15
SudiptoGmat wrote:

Project CR Butler:Day 53:Critical Reasoning (CR1)


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Recent estimates predict that between 1982 and 1995 the greatest increase in the number of people employed will be in the category of low-paying service occupations. This category, however, will not increase its share of total employment, whereas the category of high-paying service occupations will increase its share.

If the estimates above are accurate, which of the following conclusions can be drawn?

(A) In 1982 more people were working in low-paying service occupations than were working in high-paying service occupations.
(B) In 1995 more people will be working in high-paying service occupations than will be working in low-paying service occupations.
(C) Nonservice occupations will account for the same share of total employment in 1995 as in 1982.
(D) Many of the people who were working in low-paying service occupations in 1982 will be working in high-paying service occupations by 1995.
(E) The rate of growth for low-paying service occupations will be greater than the overall rate of employment growth between 1982 and 1995.


I will never be able to understand stats questions and hope not to see any in the test. :(
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Recent estimates predict that between 1982 and 1995 the  [#permalink]

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New post 19 Oct 2019, 12:51
Definitions:
\(L\): Number of Low Paying Jobs in 1982
\(H\): Number of High Paying Jobs in 1982
\(a\): gain of low-paying jobs such that \(a L\) is the number of low paying jobs in 1995
\(b\): gain of high-paying jobs such that \(b H\) is the number of high paying jobs in 1995
\(T\): total number of jobs in 1982.

Applying the conditions:
1) Since Low paying jobs ".. will not increase its share of total employment," the total number of employees must also increase by at least \(a\) to become \(aT\)

2) The text says that "category of high-paying service occupations will increase its share"
In other words \(bH/aT > H/T\), hence \(b>a\)

3)Also, since "the greatest increase in the number of people employed will be in the category of low-paying service occupations.", the number of employees increases more for low-paying jobs than for high-paying jobs: \(aL-L>bH-H\)
Rearranging \(L/H > (b-1)/(a-1)\).
Solving:
Combining 2 and 3: \(b>a\) or \(b-1>a-1\) or \((b-1)/(a-1) > 1\), one can conclude that \(L/H > 1\).
Or \(L > H\), which is exactly answer choice A.
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Re: Recent estimates predict that between 1982 and 1995 the  [#permalink]

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New post 13 Nov 2019, 11:18
Lets say in 1982 share of low= x% and share of y = y% and total no of people = 100
hence no of people in low = x/100 and no of people in high = y/100

in 1995 share of low has not increased and high has increased , lets say total no of people = 200
share of x has not increased hence x/100 becomes 2x/200
share of y has increased hence new y% will be >2y/200 (lets suppose 2.1y/200)

Now increase in no. of x from 1995 to 1982= 2x-x = x
increase in no of y = 2.1y-y = 1.1y
we know greatest increase is in no of low hence x>1.1y thus x> y
which shows no of ppl in low in 1982 was greater than no of people in high in 1982
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Re: Recent estimates predict that between 1982 and 1995 the   [#permalink] 13 Nov 2019, 11:18

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