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# Exposure to certain chemicals commonly used in elementary

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Exposure to certain chemicals commonly used in elementary [#permalink]

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03 Jan 2006, 05:05
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Exposure to certain chemicals commonly used in elementary schools as cleaners or pesticides causes allergic reactions in some children. Elementary school nurses in Renston report that the proportion of schoolchildren sent to them for treatment of allergic reactions to those chemicals has increased significantly over the past ten years. Therefore, either Renstonâ€™s schoolchildren have been exposed to greater quantities of the chemicals, or they are more sensitive to them than schoolchildren were ten years ago.

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

A. The number of school nurses employed by Renstonâ€™s elementary schools has not decreased over the past ten years.
B. Children who are allergic to the chemicals are no more likely than other children to have allergies to other substances.
C. Children who have allergic reactions to the chemicals are not more likely to be sent to a school nurse now than they were ten years ago.
D. The chemicals are not commonly used as cleaners or pesticides in houses and apartment buildings in Renston.
E. Children attending elementary school do not make up a larger proportion of Renstonâ€™s population now than they did ten years ago.
Director
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03 Jan 2006, 05:32
The argument depends on the fact that the nurses report that more children have allergic reactions than ten years ago.

A. The number of school nurses employed by Renstonâ€™s elementary schools has not decreased over the past ten years. => irrelevant, since not more nursres report that children have allergies, but nurses report more children being allergical.

B. Children who are allergic to the chemicals are no more likely than other children to have allergies to other substances. => irrelevant, because the report explicitly states that the reactions are because of those chemicals.

C. Children who have allergic reactions to the chemicals are not more likely to be sent to a school nurse now than they were ten years ago. Best

D. The chemicals are not commonly used as cleaners or pesticides in houses and apartment buildings in Renston. =>out of scope, because it doesn't matter where the children are exposed to those chemicals.

E. Children attending elementary school do not make up a larger proportion of Renstonâ€™s population now than they did ten years ago.=> out, because the argument refers to the increased proportion of affected children mentioned in report, not to the absolute number.

@vivek: Is it your child glancing at the camera?
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03 Jan 2006, 07:48
@vivek: Is it your child glancing at the camera?

Yeah
Director
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03 Jan 2006, 09:25
Congrats! He seems cute and bright. Hope he has a fine character too
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03 Jan 2006, 12:58
Agree with allbout.

If we negate C, then we discover a situation that ten years ago there were more schoolchildren exposed to the pesticides, but not sent to the nurses.
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03 Jan 2006, 21:37
Yes, the OA is 'C'
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03 Jan 2006, 23:50
Yups agree with allabout ..Its C..this was a simple one in which we can negate the statement..I usually get stuck when after negating also i cant get clues about the sentence.
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05 Jan 2006, 13:53
C it is. It took me about 3 minutes though.
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05 Jan 2006, 13:53
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# Exposure to certain chemicals commonly used in elementary

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