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An advertisement designed to convince readers of the great

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An advertisement designed to convince readers of the great [#permalink] New post 22 Jan 2013, 17:35
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75% (02:20) correct 25% (01:54) wrong based on 44 sessions
An advertisement designed to convince readers of the great durability of automobiles manufactured by the Deluxe Motor Co cites as evidence the fact that over half of all automobiles built by the company since 1970 are still on the road today, compared to no more than a third for any other manufacturer.

Which of the following strengthens the argument

A. After taking inflation into account, a new deluxe automobile costs only slightly more than a new model did in 1970.

B. The number of automobiles built by deluxe each year has not increased sharply since 1970

C. Owners of deluxe automobiles typically keep their cars well maintained

D. Since 1970, Deluxe has made few changes in the automobiles it manufactures than other car companies have made in their automobiles.

E. Deluxe automobiles have been selling at relatively stable prices in recent years.

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Re: An advertisement designed to convince readers [#permalink] New post 24 Jan 2013, 06:06
I think the answer is D

A-not related

B- not related

C- weakens

E-not related
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Re: An advertisement designed to convince readers [#permalink] New post 24 Jan 2013, 08:14
jgomey wrote:
An advertisement designed to convince readers of the great durability of automobiles manufactured by the Deluxe Motor Co cites as evidence the fact that over half of all automobiles built by the company since 1970 are still on the road today, compared to no more than a third for any other manufacturer.

Which of the following strengthens the argument

A. After taking inflation into account, a new deluxe automobile costs only slightly more than a new model did in 1970.

B. The number of automobiles built by deluxe each year has not increased sharply since 1970

C. Owners of deluxe automobiles typically keep their cars well maintained

D. Since 1970, Deluxe has made few changes in the automobiles it manufactures than other car companies have made in their automobiles.

E. Deluxe automobiles have been selling at relatively stable prices in recent years.

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I think its B.
If the annual production has not gone up sharply then the high ratio of automobiles still on road can be due to high durability.
Had this not been mentioned then one would argue that maybe the production is so high in the recent years that the number of automobiles on road has increased considerably.
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Re: An advertisement designed to convince readers [#permalink] New post 24 Jan 2013, 10:21
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I will go for B as well.

An advertisement designed to convince readers of the great durability of automobiles manufactured by the Deluxe Motor Co cites as evidence the fact that over half of all automobiles built by the company since 1970 are still on the road today, compared to no more than a third for any other manufacturer.

Which of the following strengthens the argument

A. After taking inflation into account, a new deluxe automobile costs only slightly more than a new model did in 1970.
Cost is not mentioned in the argument. We are taking about durability and number of vehicles on road. This one is out of scope.

B. The number of automobiles built by deluxe each year has not increased sharply since 1970
Suppose the company build 1,000 units each year till 2005(70,000 - Total) ,then 10,000 units each year till 2012(total 70,000) and the life of vehicle is only 5 years, then we can say the argument is invalid, as the evidence is deceiving(number of vehicles on road will be half of the vehicles manufactured since 1970). By saying that the number of units have not sharply increased, we can eliminate this possibility. So this is the correct option.

C. Owners of deluxe automobiles typically keep their cars well maintained
So deluxe automobile got lucky. This doesn't undermine the evidence.

D. Since 1970, Deluxe has made few changes in the automobiles it manufactures than other car companies have made in their automobiles.
The argument is about durability. If they are still using same parts and the consumer is accepting, still there argument and evidence holds true.

E. Deluxe automobiles have been selling at relatively stable prices in recent years.
Again, out of scope.
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Re: An advertisement designed to convince readers of the great [#permalink] New post 10 Mar 2014, 09:24
I believe the passage doesn’t state that half of all automobiles on the road were produced by Deluxe. The passage states that “over half of all automobiles BUILT BY THE COMPANY since 1970 are still on the road today.” Therefore, I believe it is irrelevant how many cars were produced by Deluxe. I went with D only because it sounds better than B.
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Re: An advertisement designed to convince readers of the great [#permalink] New post 10 Mar 2014, 10:48
Expert's post
mashableforce wrote:
I believe the passage doesn’t state that half of all automobiles on the road were produced by Deluxe. The passage states that “over half of all automobiles BUILT BY THE COMPANY since 1970 are still on the road today.” Therefore, I believe it is irrelevant how many cars were produced by Deluxe. I went with D only because it sounds better than B.


This one is definitely B, although D can be quite tempting. Here is a little trick to show clearly that the answer is D.

The question asks which answer choice strengthens the argument that Deluxe automobiles are more reliable than other cars, due to the fact that a higher percentage of Deluxe cars are still on the road.

The correct answer will make the conclusion MORE believable. Using a trick to properly identify assumptions, let's negate the answer choice (make the statement the opposite) to see if the conclusion becomes LESS believable.

B - The number of automobiles built by deluxe each year HAS not increased sharply since 1970.
If the number of autos has increased sharply in recent years it would be very easy for a higher percentage to still be on the road so the conclusion that Deluxe autos are more reliable is much, much LESS believable. B is the correct answer. [also see good explanation from ConnectTheDots above]

D - Since 1970, Deluxe has made fewer MORE changes in the automobiles it manufactures than other car companies have made in their automobiles.
This is interesting information, but it doesn't make the conclusion less believable. Cars were chunks of iron with wheels in the 70's and have experienced massive amounts of change over the years. In fact, we might expect more change from reliable car manufacturers. The amount of change does not cast doubt on reliability so D is not the correct answer.

Additionally, watch out for time when CR questions discuss both percentages and raw numbers. The GMAT loves to trap people in the shift between percentages and numbers.

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Re: An advertisement designed to convince readers of the great [#permalink] New post 10 Mar 2014, 18:39
Option B.
If the production has been relatively stable since 1970,and 50% of that production is still on road,it strengthens the argument.
Suppose the argument is about a four year period,say from 2010 to 2014 and each year prod.=100 units.According to Co.'s claim out of 400 vehicles manufactured in thse 4 yrs.,200 are still on road.Now this 200 will include almost equal no. Of autos from each of the 4 yrs.,thus strengthening Co.'s claim of durability.
In on the other hand we take increasing production for each year,say 100,200,300,400 for each of the 4 yrs.,then 500 autos will still be on road today BUT THAT NO. COULD HAVE MOST AUTOS FROM THE LATEST YEAR THUS WEAKENING CO.'S CLAIM.

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Re: An advertisement designed to convince readers of the great   [#permalink] 10 Mar 2014, 18:39
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