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# The number of North American children who are obese that is,

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Director
Joined: 29 Jul 2006
Posts: 877
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The number of North American children who are obese that is, [#permalink]  07 Dec 2006, 09:17
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The number of North American children who are obeseâ€”that is, who have more body fat than do 85 percent of North American children their ageâ€”is steadily increasing, according to four major studies conducted over the past 15 years.

If the finding reported above is correct, it can be properly concluded that
(A) when four major studies all produce similar results, those studies must be accurate
(B) North American children have been progressively less physically active over the past 15 years
(C) the number of North American children who are not obese increased over the past 15 years
(D) over the past 15 years, the number of North American children who are underweight has declined
(E) the incidence of obesity in North American children tends to increase as the children grow older

I chose E but OA is C why?
Director
Joined: 28 Dec 2005
Posts: 922
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I got C. This is because if the 85% remains constant, and the number of obese children have been increasing, then that means the number of non-obese children have also been increasing. Otherwise, the percentage would have changed.
SVP
Joined: 08 Nov 2006
Posts: 1560
Location: Ann Arbor
Schools: Ross '10
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I agree. According to the passage, obesity itself is defined as 'having body more body fat than 85% of children of the same age'

So the number of obese people cannot increase to more than 15%. SO if this number increases, to maintain the 15% statistic, the number of the other 85%(non-obese) children should increase.
Senior Manager
Joined: 24 Nov 2006
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Re: CR-North American Children [#permalink]  07 Dec 2006, 15:14
It's C.

The percentage of both obese and non-obese children has been constant over the past 15 ys: 15 and 85%, respectively. The number of obese children is steadily increasing, and so must the number of non-obese ones => C.
Re: CR-North American Children   [#permalink] 07 Dec 2006, 15:14
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