Oh! i dont understand y D?
i chose B.
I thot in this case to weaken conclusion, which is comparison here, would be to post some other reason that makes conclusion illogical.
So if Male drivers cause accidents because of mobile phone, this makes conclusion illogical.

Pls post ur comment as well!

It is given that 30% per cent of all car accident are caused by women.

In option D , "Out of all car drivers on the road 90% are male". So only 10% women car drivers causes 30% accidents. So the conclusion is wrong.

Regarding B. Irrespective of they use mobile phones or not while driving they are causing accidents. So it doesn't cause a doubt on the conclusion.

Dear MacFauz,
To be honest, I have a few criticisms of this question. First of all, the argument is particular short ---- you will notice that GMAT CR question prompts are typically meaty paragraphs. Few in the OG are as short as this. There are usually more factors in play.

Second, this argument treads dangerous close to territory that some people might consider offensive --- the whole "women are bad drivers" stereotype, which is contentious and which deeply offends some people. You will notice, the GMAT CR is scrupulous about avoiding topics that are likely to offend people on grounds of sexism, racism, religion, etc. etc. Whether the argument supports this stereotype or not, the fact that some people find it offensive is a very good reason to avoid it all together.

Finally, there's only really two factors under consideration --- gender and accident rate ---- and so this makes it extraordinarily easy to eliminate answer --- it's very clear that answers (A) & (B) & (C) & (E) are irrelevant. You see, if the argument mentions, say, four or five factors, then the answer can have an interesting interplay of these various factors, and it gives test taker much more to analyze.

Those are my thoughts.

Mike
_________________

Dear shanmugamgsn,

stimulus is not pointing any particular habit of men drivers. it is just saying their proportion in causing accidents is greater, whatsoever be the reasons.

Conclusion :- women are less prone to cause car accident than men are.

Evidence :- 70% of the accidents are caused by men.

Choice B :- men often use mobile phones while driving. so this may explains the cause behind greater proportion of men causing accidents than that of women. How does this choice weakens the argument? It indeed strengthens.

Choice D :- 90% of the car drivers are men which cause 70% accidents, whereas 10% of car drivers are women which causes 30% of accidents.
This clearly weakens the argument

Regards,

Abhijit.
_________________

Difficulty:

5% (low)


Question Stats:


100% (01:42) correct 0% (00:00) wrong based on 11 sessions
For every 100 car accidents on the road, not more than 30 are caused by female drivers. Hence it can be concluded that women are less prone to cause car accidents on the road than men are.

Which of the following, if true, would cast the most serious doubt on the conclusion drawn by the argument?

A) Female drivers on average own more expensive cars than male drivers do.

B) Male drivers are much more likely to have been using a mobile phone while causing the accident than are female drivers.

C) Male drivers take better care of their cars than do female drivers.

D) Out of all car drivers on the road, ninety percent are male.

E) Heavy vehicles such as trucks and buses are almost always driven by male drivers.

I believe that is D

thanks

D) Out of all car drivers on the road, ninety percent are male.

THIS IS THE CORRECT ANSWER AS LETS AKE THE EXAMPLE THAT THERE ARE 150 CARS (135 MALE AND 15 FEMALE)AND THE ACCIDENT OF 50 CARS OCCURS. SO 30 PERCENT OF 50 IS 15 THAT IS EQUAL TO TOTAL NUMBER OF WOMEN DRIVER SO CONCLUSION OF that woman is less prone to cause car accidents on the road than men are is refuted .
thank you

For every 100 car accidents on the road, not more than 30 are caused by female drivers. Hence it can be concluded that women are less prone to cause car accidents on the road than men are.

Which of the following, if true, would cast the most serious doubt on the conclusion drawn by the argument?

A) Female drivers on average own more expensive cars than male drivers do.

B) Male drivers are much more likely to have been using a mobile phone while causing the accident than are female drivers.

C) Male drivers take better care of their cars than do female drivers.

D) Out of all car drivers on the road, ninety percent are male.

E) Heavy vehicles such as trucks and buses are almost always driven by male drivers.