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Director
Joined: 14 Jul 2004
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I dont understand how the OA is "E".......
Personally i think the OA should be "B". "D" in my mind is wrong for all the reasons that SigEpUIC explained.
We know nothing about the either "distribution of the salary (no. of people with a certain salary range" or the "the # of people in a particular county....Therefore all theories on "avg. salaries" or "the # of people with a certain salary is wrong. Because for any statistics that are calculated to prove that C, D are correct, i think there is another set of # that will disprove C,D.
I'm just struggling with the OA....When i first solved this question i didnt give "E' even a thought.
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Senior Manager
Joined: 25 Jul 2004
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I reject the answer of E. I can think of an easy example to disprove it. Where did the question come from, is there an OE?
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Intern
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I say A- what is OA?
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Manager
Joined: 28 Jul 2004
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Between C and B, I prefer B.
C is directly stated from the premise 1. It doesnt seem to involve the next premise, which is not right for any particular conclusion.
In case of B, premise 1 states that the % of households above $40000 is more in M county, and % of household is above $60000 is more in S county.
Lets say x % in county M and y% in county S are the corresponding figures we are talking here.
since y is above $60000, it has to be above $40000 too. assuming that there is no household in M county is between 40000-60000, we would end up having x% above $60000, and which means that x > y, but we know for sure this is not so from premise 2. so there has to some number which is reduced from x, lets say z, which exists in between 40000-60000.
so the conclusion is
B
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Manager
Joined: 03 Jan 2004
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My feeling is that if the answer key says anything but B, the key is wrong. The answer can only be B.
I have written the problem out again. I will try to accept each answer as true, and see where we get. Let us say, for the first few answer choices, that the number of people in Merton is 1000, and the number of people in Sommer is 10.
Given:
The percentage of households with an annual income of more than $40,000 is higher in Merton county than in any other county. However, the percentage of households with an annual income of $60,000 or more is highest in Sommer County.
If the statements above are true, which of the following can properly be concluded on the basis of them?
A) No household in Merton county has an annual income of $60,000 or more.
Let's say that Merton has 30% (300 people) earning higher than 40K, with one person (0.1%) earning 62K. To justify the original premise, 10% (1 person) of Sommer has incomes over 60K. So A is out.
B) Some households in Merton county have an annual income between $40,000 and $60,000.
There is no way around this. Even if some people have more than $60,000, it cannot be that no one has between 40-60K.
C) The number of households with an annual income of more than $40,000 is greater in Merton than in Sommer County
In the above case, this is true. Let's see if we can find numbers that defeat this premise:
Let's take: 100 in Summer, 30% over 60K (30 people); 10 in Merton, 40% over 40K (4 people).
D) Average annual household income is higher in Sommer than in Merton County
Take the new numbers from C) above.
It's possible to say that all the rest have 0 income (70x0 + 30X60)/100 = 18K; Merton take 6 people with 35K and the 4 above at 45K. No computing, Merton is higher.
E) The percentage of households with an annual income of $80,000 is higher in Sommer than in Merton County.
No information.
Leanna
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Director
Joined: 18 Feb 2005
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I think B is a close winner...
A. No household in Merton county has an annual income of $60,000 or more.
This a sweeping generalization
B. Some households in Merton county have an annual income between $40,000 and $60,000.
Looks OK
C. The number of households with an annual income of more than $40,000 is greater in Merton than in Sommer county.
Percentage is daisy when convereted to numbers. We cannot correlate anything here
D. Average annual household income is higher in Sommer than in Merton county.
We cannot say this 'cos we do not know the number of people in each county
E. The percentage of households with an annual income of $80,000 is higher in Sommer than in Merton county.
This is again tough to prove
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VP
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I will go with C
It cannot be B since the HH income more than $40,000 is higher in Merton County, so there has to be More HHs and not some HHs.
Eg:
Merton County(in Thousands): 10, 20, 30, 40, 40, 45, 50, 55, 50, 70;
% of HHs > 40,000 is 70%
% of HHs > 60,000 is 10%
Average: 41
Sommer County (in Thousands): 10, 15, 20, 25, 30, 35, 40, 45, 70, 80
% of HHs > 40,000 is 40%
% of HHs > 60,000 is 20%
Average: 37
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Senior Manager
Joined: 14 Jul 2005
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C. It is definitely true.. since HH income in Merton county > any other county.
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Senior Manager
Joined: 17 Apr 2005
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Picked B.
HMTG.
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Senior Manager
Joined: 06 Apr 2005
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Aha!!! This question is a classic GMAT Trap. I still fell for the wrong choice - C, before, I checked the argument once again. The answer is "VERY CLEARLY B".
A note of caution - Always think twice when you see a question with percentages and numbers.
First let us weed out the irrelevant and wrong choices. A, D and E are out, as we cannot conclude any of those statements.
Now consider the following example
Lets assume that Merton county has 5000 residents, of which 2500 earn more than $40,000, and 5 residents earn more than $60,000. Therefore 50% of the residents earn more than $40,000 a year
Lets assume that Sommer county has 20,000 residents, of which 5000 earn more than $40,000 and 100 residents earn more than $60,000. Therefore 20% of the residents earn more than $40,000 a year, BUT, Sommer county has 2,500 residents more than Merton county who earn more than $40,000
From the above example. C cannot be inferred. But, B is 100% true.
Hope my explanation is clear to all of you
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Senior Manager
Joined: 29 Jun 2005
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It is definately not (C)
Suppose:
Population of M county is 10 people
Population of S county is 100 people
In county M there are 9 people who earn more than 40K - 90%
In county S there are 80 people who earn more than 40K - 80% of which 40 people earn more than 60K - 40%.
80>8. I hope, that would help.
the answer is (B)
This is rather good question, but the answer is too simple and promitive.
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Manager
Joined: 17 Jun 2005
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Another vote for B.
B. Some households in Merton county have an annual income between $40,000 and $60,000.
- Definitely true although it is stating something that is too obviously true.
C. The number of households with an annual income of more than $40,000 is greater in Merton than in Sommer county.
- A higher percentage in A than B does not necessarily gurantee a higher NUMBER of occurances in A than B. For example, 5 out of 10 in A represents 50 % while 10 out of 40 in B represents only 25%, but the number of occurances (in terms of events) is higher in B.
E. The percentage of households with an annual income of $80,000 is higher in Sommer than in Merton county.
- This is another close one, but this is tough to prove. If the majority of the household incomes are in the range between $60,000-$80,000 in Sommer, and only very few earn more than $80,000, this may not be the case.
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VP
Joined: 29 Dec 2005
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B. Some households in Merton county have an annual income between $40,000 and $60,000.
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Director
Joined: 26 Sep 2005
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B. agree with the Prof.
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Director
Joined: 27 Feb 2006
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As far as I can remember, this question was discussed before.. I don't remember the OA but now I am going with
^ B ^
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Senior Manager
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joemama142000 wrote: The percentage of households with an annual income of more than $40,000 is higher in Merton county than in any other county. However, the percentage of households with an annual income of $60,000 or more is highest in Sommer county. If the statements above are true, which of the following can properly be concluded on the basis of them? A. No household in Merton county has an annual income of $60,000 or more. B. Some households in Merton county have an annual income between $40,000 and $60,000. C. The number of households with an annual income of more than $40,000 is greater in Merton than in Sommer county. D. Average annual household income is higher in Sommer than in Merton county. E. The percentage of households with an annual income of $80,000 is higher in Sommer than in Merton county.
We can assume here that in most people in Merton county can have more than 60K annual income.
Only B can give a proper conclusion that some household can have income b/w 40k and 60k
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Manager
Joined: 30 Jan 2006
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A – extreme wording
B – yes, can be concluded.
C – absolute numbers are not discussed, just the percentages.
D – cannot be concluded from the info given.
E – Out of scope.
Answer, B.
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Manager
Joined: 20 Feb 2006
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B here. I took long to deduce this though.
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Senior Manager
Joined: 11 Nov 2005
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One more for B.
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Manager
Joined: 06 Aug 2005
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B it is -
joemama142000 wrote: A. No household in Merton county has an annual income of $60,000 or more. can't say. B. Some households in Merton county have an annual income between $40,000 and $60,000. has to be else, Merton would have the highest percentage in place of Sommer C. The number of households with an annual income of more than $40,000 is greater in Merton than in Sommer county. Can't say D. Average annual household income is higher in Sommer than in Merton county. Can't say E. The percentage of households with an annual income of $80,000 is higher in Sommer than in Merton county.
Both can be zero so can't say
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