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Two tough questions

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Two tough questions [#permalink] New post 29 Aug 2003, 10:57
Hi, a friend asked me these two tough questions. I decide to post them in this forum instead of in Verbal and Math seperately, so that gurus can work on them rightaway... These are tough question so please take some time to figure out....
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In the past, most children who went sledding in the winter snow in Verland used wooden sleds with runners and steering bars. Ten years ago, smooth plastic sleds became popular; they go faster than wooden sleds but are harder to steer and slow. The concern that plastic sleds are more dangerous is clearly borne out by the fact that the number of children injured while sledding was much higher last winter than it was ten years ago.

Which of the following, if true in Verland, most seriously undermines the force of the evidence cited?

A. A few children still use traditional wooden sleds.

B. Very few children wear any kind of protective gear, such as helmets, while sledding.

C. Plastic sleds can be used in a much wider variety of snow conditions than wooden sleds can.

D. Most sledding injuries occur when a sled collides with a tree, a rock, or, another sled.

E. Because the traditional wooden sled can carry more than one rider, an accident involving a wooden sled can result in several children being injured.

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Math: Among 100 people, there are 48,45,and 57 read book a, b, c respectively. 20 people read all of the three books, 10 read nothing. What the number of people who read only two books?
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 [#permalink] New post 29 Aug 2003, 11:25
These should be posted in the math and verbal sections, but nonetheless...

Q1 C - This shows that the plastic sleds can be used more frequently, and therefore result in more injuries due to a higher volume of use, rather than being less safe.

Q2 20: (48 + 45 + 57) - 10 - 20 - X = 100, or just draw a venn diagram
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different answer [#permalink] New post 29 Aug 2003, 14:59
For CR, I don't think the answer it C.
C is tricky one, though.

I think the real answer is B, because people don't wear helmets, etc, then
the fast speed caused deadly crashes. And pause for a moment to think about the ski situation: If you don't wear helmet, etc, and you die, you cannot blame the "gear" for going fast. Same for driving a sport car without using safety belt: you cannot blame for the sport car for being too fast.

I agree C is loosely good, but not as good as B. Debate?
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 [#permalink] New post 29 Aug 2003, 15:12
i don't agree.

B implies that they never wore protective gear, as it does not state that just now with the plastic sleds they do not wear gear. So, all else equal, now with plastic sleds kids are still getting hurt more frequently. Maybe the plastic sleds are harder to control, etc... we need an answer choice that explains a DIFFERENCE between now and then OTHER than the quality of the sled. If B said "kids used to wear protective gear on sleds, but now do not", then I would go with that one. But it doesnt, so i stand by C
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 [#permalink] New post 29 Aug 2003, 18:28
For CR question the answer would be E. The question asks which one will undermine the evidence. So the choice E says the accidents are inevidable even in wooden sled scenario. This will damage the argument/assumption that only plastic sled causes more accidents.

You already have the answer for math question. :-D
  [#permalink] 29 Aug 2003, 18:28
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