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In Wareland last year, 16 percent of licensed drivers under 21 and 11

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Re: In Wareland last year, 16 percent of licensed drivers under 21 and 11 [#permalink]

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New post 25 Jul 2017, 09:00
hrishikeshsawle wrote:
Can anyone explain why E is incorrect.

If there is any age bracket for which the accident rate is lower than that of age group 65 and older then conclusion is challenged. It means there is an age group having lesser driving experience but able to drive safely compared with age group 65 & older.


In absence of Option A, i would have gone with E

But now, if you think about it, people from age group 24-64 are actually out of scope. Also, it would have challenged the conclusion on one front as option B has a limited sample and it does not include the given sample (<24 ).

If you read Option A, it caters to all the age groups. And even if Option E was true, Option A would still have existed. Hence, assumption-wise A is more strong.



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Re: In Wareland last year, 16 percent of licensed drivers under 21 and 11 [#permalink]

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New post 26 Jul 2017, 09:08
i thought it wasD. can sumbdy explain to me

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Re: In Wareland last year, 16 percent of licensed drivers under 21 and 11 [#permalink]

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New post 27 Jul 2017, 02:53
For those who do not know why E is incorrect:
"Age bracket" means a group of people having approximately the same age. So it is comparing the group of 65 or older with the other group of age. So it irrelevant.
Hope it helps

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Re: In Wareland last year, 16 percent of licensed drivers under 21 and 11 [#permalink]

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New post 01 Sep 2017, 20:37
hrishikeshsawle wrote:
Can anyone explain why E is incorrect.

If there is any age bracket for which the accident rate is lower than that of age group 65 and older then conclusion is challenged. It means there is an age group having lesser driving experience but able to drive safely compared with age group 65 & older.



E is supporting the answer, it can't be considered as an assumption.
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Re: In Wareland last year, 16 percent of licensed drivers under 21 and 11 [#permalink]

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New post 25 Sep 2017, 23:09
E is not correct because it doesn't necessarily talk about accident rate for the licensed drivers of another age group, just another age group. Irrelevant comparison.

A. If we negate A we get Drivers 65 and older do, on average, drive very many fewer miles per year than drivers 24 and younger. If this is true, the conclusion breaks down.
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Re: In Wareland last year, 16 percent of licensed drivers under 21 and 11 [#permalink]

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New post 26 Sep 2017, 20:41
hazelnut wrote:
The Official Guide for GMAT Review 2018

Practice Question
Question No.: CR 635

In Wareland last year, 16 percent of licensed drivers under 21 and 11 percent of drivers ages 21-24 were in serious accidents. By contrast, only 3 percent of licensed drivers 65 and older were involved in serious accidents. These figures clearly show that the greater experience and developed habits of caution possessed by drivers in the 65-and-older group make them far safer behind the wheel than the younger drivers are.

Which of the following is an assumption on which the argument depends?

(A) Drivers 65 and older do not, on average, drive very many fewer miles per year than drivers 24 and younger.

(B) Drivers 65 and older do not constitute a significantly larger percentage of licensed drivers in Wareland than drivers ages 18-24 do.

(C) Drivers 65 and older are less likely than are drivers 24 and younger to drive during weather conditions that greatly increase the risk of accidents.

(D) The difference between the accident rate of drivers under 21 and of those ages 21-24 is attributable to the greater driving experience of those in the older group.

(E) There is no age bracket for which the accident rate is lower than it is for licensed drivers 65 and older.



A & B

Conclusion : These figures clearly show that the greater experience and developed habits of caution possessed by drivers in the 65-and-older group make them far safer behind the wheel than the younger drivers are.

So we are attributing less percentage figure (3%) to greater experience and developed habits of caution
if we can prove that figure is less because of some other reason that will weaken the conclusion.

lets say there are total 2700 people old above 65. 3% of these will be 81.
and no of young people 300 and 27% of this will be 81.

this doesn't do anything to conclusion.
if the premise is : In Wareland last year, no. of licensed drivers under 21 and no. of drivers ages 21-24 were in serious accidents. are more than no. of licensed drivers 65 and older were involved in serious accidents.

and if we can say even if no. of licensed drivers 65 and older were involved in serious accidents are less but % of licensed drivers 65 and older were involved in serious accidents then it wouldn't have been right.


A is weakener.

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Re: In Wareland last year, 16 percent of licensed drivers under 21 and 11 [#permalink]

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New post 04 Oct 2017, 09:58
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In Wareland last year, 16 percent of licensed drivers under 21 and 11 percent of drivers ages 21-24 were in serious accidents. By contrast, only 3 percent of licensed drivers 65 and older were involved in serious accidents. These figures clearly show that the greater experience and developed habits of caution possessed by drivers in the 65-and-older group make them far safer behind the wheel than the younger drivers are.

Which of the following is an assumption on which the argument depends?


For Assumption problems, I first ID the Conclusion from the Passage (highlighted above), then NEGATE each A/C to see which one BREAKS the Argument's Conclusion


(A) Drivers 65 and older do not, on average, drive very many fewer miles per year than drivers 24 and younger.
- Correct. Drivers 65+ are not SAFER behind the wheel...they just drive a LOT less, so the probability of them getting into accidents is far less.

(B) Drivers 65 and older do not constitute a significantly larger percentage of licensed drivers in Wareland than drivers ages 18-24 do.
- Opposite. When negated, this strengthens the conclusion.

(C) Drivers 65 and older are no less likely than are drivers 24 and younger to drive during weather conditions that greatly increase the risk of accidents.
- Incorrect. Drivers 65+ could be AS likely as drivers 24 and younger.

(D) The difference between the accident rate of drivers under 21 and of those ages 21-24 is not attributable to the greater driving experience of those in the older group.
- Incorrect. What about the "developed habits" mentioned in the passage? also, "the difference" is ambiguous -- MAIN difference? ONLY difference? Are there other differences that should be inferred here?

(E) There is no an age bracket for which the accident rate is lower than it is for licensed drivers 65 and older.
- Incorrect. Does not address whether the licensed drivers 65+ years old have more/better driving experience AND better developed habits.

Kudos please if you find this helpful :)

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Re: In Wareland last year, 16 percent of licensed drivers under 21 and 11   [#permalink] 04 Oct 2017, 09:58

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In Wareland last year, 16 percent of licensed drivers under 21 and 11

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