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30 May 2016, 09:29
I am confused over the second option. Option B says that the in recent years many more PZ 1000's have been sold than any other kind of car in its class. If the number of cars sold is very large, then average number of accidents per car [ total accidents/ total no of cars] would be low. This means that average number of injuries per accident for all the PZ cars would be low. So, can't we say that this option also weakens the argument? Since average number of low accidents is just because of large number of sales and the car could be actually not that safe.

I agree with option C also, but I am not convinced with the OG's explanation [High sales indicate it is actually safer and hence strengthens] for option B. Could somebody please explain where am I wrong [if].
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10 Aug 2016, 13:07
RaghavSingla wrote:
I am confused over the second option. Option B says that the in recent years many more PZ 1000's have been sold than any other kind of car in its class. If the number of cars sold is very large, then average number of accidents per car [ total accidents/ total no of cars] would be low. This means that average number of injuries per accident for all the PZ cars would be low. So, can't we say that this option also weakens the argument? Since average number of low accidents is just because of large number of sales and the car could be actually not that safe.

I agree with option C also, but I am not convinced with the OG's explanation [High sales indicate it is actually safer and hence strengthens] for option B. Could somebody please explain where am I wrong [if].

Hi,
This doesn't weaken the argument if you read the line The Highway Traffic Safety Institute reports that the PZ 1000 has the fewest injuries per accident of any car in its class in argument carefully . option B
(B) In recently years many more PZ 1000â€s have been sold than have any other kind of car in its class. Since, it is about injuries per accident , you can't get injuries corresponding to whole pz cars given by the statement that it sold more than others.for example only few cars of Pz are involved in accidents than others than this will strengthen the argument. So , option 'B' is irrelevant.However, in option 'C' it says it is involved in accidents higly than others . This means the number of injuries caused by this car is more , hence weaken the fact that it is safe than others. Hope it is clear
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15 Aug 2016, 03:59
fozzzy wrote:
Can someone please explain this question Confused between Option C and D.

D states that the difference is quite pronounced.

The question states that fewest among other cars.

Implying that the car has indeed a pronounced advantage in the no. of injuries/ accident

This is actually strengthening the argument. And can't be the answer
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26 Sep 2016, 00:38
anuramm wrote:
Official Guide for GMAT Verbal Review, 2nd Edition

Practice Question
Question No.: 24
Page: 124
Difficulty:

The Highway Traffic Safety Institute reports that the PZ 1000 has the fewest injuries per accident of any car in its class. This shows that the PZ 1000 is one of the safest cars available today.

Which of the following, if true, most seriously weakens the argument in the advertisement?

(A) The Highway Traffic Safety Institute report listed many cars in other classes that had more injuries per accident than did the PZ 1000.
(B) In recently years many more PZ 1000s have been sold than have any other kind of car in its class.
(C) Cars in the class to which the PZ 1000 belongs are more likely to be involved in accidents than are other types of cars.
(D) The difference between the number of injuries per accident for the PZ 1000 and that for other cars in its class is quite pronounced.
(E) The Highway Traffic Safety Institute issues reports only once a year.

Tricky one: author states that PZ1000 suffered fewest injuries per accident in its class. therefore it is one of the safest car.

What if class to which PZ1000 belongs, other car suffers injuries such as 1000000000 in a month and PZ1000 suffers 100000 accident in a month. Though PZ1000 suffers fewest accident. Do you think you would sit in such a car ??

Option C is what we want.
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15 Mar 2017, 15:36

The Highway Traffic Safety Institute reports that the PZ 1000 has the fewest injuries per accident of any car in its class. This shows that the PZ 1000 is one of the safest cars available today.

Which of the following, if true, most seriously weakens the argument in the advertisement?

(A) The Highway Traffic Safety Institute report listed many cars in other classes that had more injuries per accident than did the PZ 1000.
each clss has its highest and the lowest. does not weaken

(B) In recently years many more PZ 1000s have been sold than have any other kind of car in its class.
the number of cars sold is out of scope we are focusing on the accident data
(C) Cars in the class to which the PZ 1000 belongs are more likely to be involved in accidents than are other types of cars.
the choice weakens the argument by stating that the data collected for the PZ1000s is lot more then athe other cars,that means that the accident data is larger than the other cars it means that the car may have large number of injuries or less number of injuries ,this weakens the argument.

(D) The difference between the number of injuries per accident for the PZ 1000 and that for other cars in its class is quite pronounced.
does not weaken.

(E) The Highway Traffic Safety Institute issues reports only once a year.
irrelevant.
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14 Jul 2017, 07:05
W (Weaken): Conclusion PZ1000 is the safest car
Missing info : Is the class in which PZ1000 belongs to the safest class among all classes of cars?

(A) The Highway Traffic Safety Institute report listed many cars in other classes that had more injuries per accident than did the PZ 1000.
Actually supporting the conclusion to some extent.

(B) In recent years many more PZ 1000s have been sold than have any other kind of car in its class.
Irrelevant, as the premise made a point about safety in terms of injuries per accident and not total injuries or total accidents.

(C) Cars in the class to which the PZ 1000 belongs are more likely to be involved in accidents than are other types of cars.
Perfect Weakener. It says, the car belongs to ‘most accident prone’ category / class. So being safest in this category does not make it safest of all the classes

(D) The difference between the number of injuries per accident for the PZ 1000 and that for other cars in its class is quite pronounced.
Okay the difference is pronounced but on is it in favour of PZ1000 or against it ?
Half information ….Can’t help answering the question.

(E) The Highway Traffic Safety Institute issues reports only once a year.
Irrelevant.
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12 Aug 2017, 07:34
What do we mean when we say that the difference is quite pronounced??

D. The difference between the number of injuries per accident for the PZ 1000 and that for other cars in its class is quite pronounced.

As per my understanding, it means that there is quite a difference between the number of injuries per accident for the PZ 1000 and that for other cars in its class. So, it strengthens above conclusion.

Can someone comment on this?? I am not getting the actual meaning of this option? mikemcgarry
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12 Aug 2017, 11:50
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vnigam21 wrote:
What do we mean when we say that the difference is quite pronounced??

D. The difference between the number of injuries per accident for the PZ 1000 and that for other cars in its class is quite pronounced.

As per my understanding, it means that there is quite a difference between the number of injuries per accident for the PZ 1000 and that for other cars in its class. So, it strengthens above conclusion.

Can someone comment on this?? I am not getting the actual meaning of this option? mikemcgarry

Dear vnigam21

I'm happy to respond. Like all official questions, this one is brilliant.

First of all, you are correct in the basic word usage. The word "pronounced" is an idiomatic intensifier with a few words, such as "difference." A "pronounced difference" is a fancy way to say "a very big difference" or "quite a difference."

We already know that the PZ 1000 has fewer accidents than other cars in its class, and (D) emphasizes this: it has many many fewer accidents than other cars in its class. Thus, it is really far and away the best in its class. But, that still leave the issue: how safe is this class of cars? If this is a class of the most accident prone cars on the road, then being the best in that class would not really be a ringing endorsement. Because we are doubt on this, (D) is not the strongest strengthener. By contrast, (C) nails this issue, and is the best answer.

Does all this make sense?
Mike
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12 Aug 2017, 20:12
I am convinced that option C is the best answer. But after going this thread what I can see is that most of the people have commented for option E is that its irrelevant.

(E) The Highway Traffic Safety Institute issues reports only once a year.

But as per my understanding its not irrelevant. It also slightly weakens the conclusion of the argument. But it is not as good a option as option C. Can someone comment on this option, in more detail? chiranjeev
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14 Aug 2017, 13:22
vnigam21 wrote:
I am convinced that option C is the best answer. But after going this thread what I can see is that most of the people have commented for option E is that its irrelevant.

(E) The Highway Traffic Safety Institute issues reports only once a year.

But as per my understanding its not irrelevant. It also slightly weakens the conclusion of the argument. But it is not as good a option as option C. Can someone comment on this option, in more detail? chiranjeev

Dear vnigam21,

I'm happy to help.

In connection with this question, I will recommend this blog article:
GMAT Critical Reasoning and Outside Knowledge
Students have the mistaken impression that all outside knowledge is irrelevant to the GMAT CR. Yes, very specific knowledge is irrelevant: in this case, we can't even have specific knowledge about the PZ 1000, because it's entirely a work of fiction. Nevertheless, it's very important to have a real-world business sense.

For example, how long does it take to redesign a car? What is the process from drawing board to released product available to consumers? If you plan to get an MBA, this is an excellent thing to know and understand, not only for cars but for all kinds of products. Business schools prefer that people walk in with these basic kinds of knowledge already, and the GMAT rewards such knowledge.

Generally, from design to finished product, for a car, takes 2-3 years. Toyota is an exceptional company: they can have something out and on the road in a year, which is simply mind-blowing.

OK, that's some relevant real world knowledge.

Now, let's look at this argument. The advertiser claims that the PZ 1000 is a safe as a kitten. What's wrong with this claim?

You say that (E) is not irrelevant.
(E) The Highway Traffic Safety Institute issues reports only once a year.

Are you imagining that the car's design might change, inside of year's time, from something very safe to something no so safe? Given the sheer time span that it takes to redesign a particular car, this seems irrelevant.

You see, outside general knowledge about how industries work is not so much helpful for getting the answer, but it does make the irrelevant information a little clearer.

Does all this make sense?
Mike
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16 Aug 2017, 22:14
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Answer choice 'C' only weakens the argument.
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19 Aug 2017, 12:04

The Highway Traffic Safety Institute reports that the PZ 1000 has the fewest injuries per accident of any car in its class. This shows that the PZ 1000 is one of the safest cars available today.

Which of the following, if true, most seriously weakens the argument in the advertisement?

(A) The Highway Traffic Safety Institute report listed many cars in other classes that had more injuries per accident than did the PZ 1000.
If other classes of cars have more # of accidents, then this option will strengthen the argument.

(B) In recently years many more PZ 1000s have been sold than have any other kind of car in its class.
Out of scope

(C) Cars in the class to which the PZ 1000 belongs are more likely to be involved in accidents than are other types of cars.
Correct. If this segment of cars are involved in more accidents, then PZ1000 can't be safer than other types of car. This argument is basically a causal type, since the author compares the # of accidents within a type of car and then proclaims it as the BEST amongst all cars. This option rightly compares the segment of cars to which PZ1000 belongs with the other segment of cars.

(D) The difference between the number of injuries per accident for the PZ 1000 and that for other cars in its class is quite pronounced.
This definitely strengthens the argument

(E) The Highway Traffic Safety Institute issues reports only once a year.
Out of scope
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29 Sep 2017, 09:49
there is no pattern in this question, but test takers must use logic and common sense to see the weakener.
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20 Dec 2017, 01:21
I chose C.
The argument goes on like this " Peter is the best student in class A => Peter is the best student of the whole school"
But there's a big problem here. What if class A is one of the worst class of the school? => break the argument

Back to argument:
PZ2000 is the safest in in class -> It's the safest cars among all
What if its class (PZ2000's class) is the least safest car class like these cars belonged to this class are more prone to accidents?
-> Break the argument

=> Option C
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20 Dec 2017, 03:31
anuramm wrote:
Official Guide for GMAT Verbal Review, 2nd Edition

Practice Question
Question No.: 24
Page: 124
Difficulty:

The Highway Traffic Safety Institute reports that the PZ 1000 has the fewest injuries per accident of any car in its class. This shows that the PZ 1000 is one of the safest cars available today.

Which of the following, if true, most seriously weakens the argument in the advertisement?

(A) The Highway Traffic Safety Institute report listed many cars in other classes that had more injuries per accident than did the PZ 1000.
(B) In recently years many more PZ 1000s have been sold than have any other kind of car in its class.
(C) Cars in the class to which the PZ 1000 belongs are more likely to be involved in accidents than are other types of cars.
(D) The difference between the number of injuries per accident for the PZ 1000 and that for other cars in its class is quite pronounced.
(E) The Highway Traffic Safety Institute issues reports only once a year.

except for inference question, all other questions in cr can be solve by criticization.
wheneveer we see these kinds of question, try to criticize the argument. in which condition, the argument fall apart. frankly speaking, practicing cricticization is extremely helpful for cr section.

how to criticize this argument. your criticization you prethink, may be different from the criticization in the answer, but your criticization still strongly help bring you closer to the answer .

in this problem, I can attack argument by saying that the statistic is not good. then, going down to the answer choices, i do not see any match. but I realize that C also attack the argument because an new idea different from my criticization emerge. the idea is that the conclusion come from only the statistic in one class of car. C is bingo.

I want to illustrate the process of doing a cr problem. the knowlege of kinds of argument such as causal argument, plan argument, history argument just help you criticize. do not remember the formular of this argument.

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