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A survey of address changes filed with post offices and driver’s

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A survey of address changes filed with post offices and driver’s  [#permalink]

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New post 19 Jan 2019, 09:04
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A survey of address changes filed with post offices and driver’s license bureaus over the last ten years has established that households moving out of the city of Weston outnumbered households moving into the city two to one. Therefore, we can expect that next year’s census, which counts all residents regardless of age, will show that the population of Weston has declined since the last census ten years ago.

Which one of the following, if true, most helps strengthen the argument?

(A) Within the past decade many people both moved into the city and also moved out of it.
(B) Over the past century any census of Weston showing a population loss was followed ten years later by a census showing a population gain.
(C) Many people moving into Weston failed to notify either the post office or the driver’s license bureau that they had moved to the city.
(D) Most adults moving out of Weston were parents who had children living with them, whereas most adults remaining in or moving into the city were older people who lived alone.
(E) Most people moving out of Weston were young adults who were hoping to begin a career elsewhere, whereas most adults remaining in or moving into the city had long-standing jobs in the city.

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A survey of address changes filed with post offices and driver’s  [#permalink]

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New post 21 Jan 2019, 06:29
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A survey of address changes filed with post offices and driver’s license bureaus over the last ten years has established that households moving out of the city of Weston outnumbered households moving into the city two to one. Therefore, we can expect that next year’s census, which counts all residents regardless of age, will show that the population of Weston has declined since the last census ten years ago.

Type- strengthen
Boil it down- we can expect that next year’s census, which counts all residents regardless of age, will show that the population of Weston has declined since the last census ten years ago.


(A) Within the past decade many people both moved into the city and also moved out of it. - incorrect - we already know that more people moved out
(B) Over the past century any census of Weston showing a population loss was followed ten years later by a census showing a population gain. - Irrelevant- we are talking about a decade whereas this choice talks about a century; at best this choice is a mild weakener
(C) Many people moving into Weston failed to notify either the post office or the driver’s license bureau that they had moved to the city. - weakens - so the number of people moving into Weston may be underreported and the ACTUAL number is more than the reported number
(D) Most adults moving out of Weston were parents who had children living with them, whereas most adults remaining in or moving into the city were older people who lived alone. - Correct
Majority of people moving out are families while most people who stayed or moved in are singles(Children would not have their own postal address and driving license). Therefore, the census will show that the population has declined
for example - 2 families moved out and each of the family has 4 members
1 single person moved in. Although, the household moving out to moving in ratio is 2:1, the ACTUAL number of people moving out to moving in ratio is 8:1

(E) Most people moving out of Weston were young adults who were hoping to begin a career elsewhere, whereas most adults remaining in or moving into the city had long-standing jobs in the city. - Irrelevant

Answer D
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Re: A survey of address changes filed with post offices and driver’s  [#permalink]

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New post 21 Jan 2019, 09:01
Akela wrote:
A survey of address changes filed with post offices and driver’s license bureaus over the last ten years has established that households moving out of the city of Weston outnumbered households moving into the city two to one. Therefore, we can expect that next year’s census, which counts all residents regardless of age, will show that the population of Weston has declined since the last census ten years ago.

Which one of the following, if true, most helps strengthen the argument?

(A) Within the past decade many people both moved into the city and also moved out of it.
(B) Over the past century any census of Weston showing a population loss was followed ten years later by a census showing a population gain.
(C) Many people moving into Weston failed to notify either the post office or the driver’s license bureau that they had moved to the city.
(D) Most adults moving out of Weston were parents who had children living with them, whereas most adults remaining in or moving into the city were older people who lived alone.
(E) Most people moving out of Weston were young adults who were hoping to begin a career elsewhere, whereas most adults remaining in or moving into the city had long-standing jobs in the city.


Outflow > Inflow
Conclusion : Result of census will be lesser

Prethinking : What about Population growth in the city , what if the pop grows faster ?? Can it still have less population compared to last census...

Non but (D) flows along our pre thinking logic/lines, hence Answer must be (D)
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Re: A survey of address changes filed with post offices and driver’s   [#permalink] 21 Jan 2019, 09:01
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