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# A chemical company claims that, since only one of 520 rats

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Director
Joined: 13 Nov 2003
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Location: Florida
A chemical company claims that, since only one of 520 rats [#permalink]

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06 Jan 2004, 22:13
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A chemical company claims that, since only one of 520 rats that were given high doses of a new artificial sweetener developed cancer while all the others remained healthy, the sweetener is not carcinogenic for human beings and ought to be approved for human consumption.
Which of the following, if true, most strongly supports the chemical companyтАЩs claim?

(A) Chemicals that are carcinogenic for rats are usually also carcinogenic for other animals, such as guinea pigs, used in experiments.
(B) The spontaneous incidence of cancer in this particular strain of rat is approximately one in 540.
(C) Tests conducted on a certain strain of mouse show that, of 500 mice given a dose of sweetener similar to that given the rats, 53 developed cancer.
(D) Certain chemicals that are carcinogenic for human beings have been shown not to be carcinogenic for rats.
(E) The average lifespan of the strain of rat used in the experiment is 2 years; the chemical company terminated the experiment when the rats were 13 months old.

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Senior Manager
Joined: 05 May 2003
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06 Jan 2004, 22:19
B ??

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Director
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06 Jan 2004, 23:10
b) shows that the natural rate of spontaneous cancer in rats is not too different from the cancer rates in the lab rats that are given high doses of the chemical. Dj, let me know if I'm full of B.S. Thanks.

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Director
Joined: 13 Nov 2003
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07 Jan 2004, 07:48
Titleist wrote:
b) shows that the natural rate of spontaneous cancer in rats is not too different from the cancer rates in the lab rats that are given high doses of the chemical. Dj, let me know if I'm full of B.S. Thanks.

hmm..now, I understand it. yep, It is B.
this, totally, ran me over..

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Director
Joined: 14 Oct 2003
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Kudos [?]: 59 [0], given: 0

Location: On Vacation at My Crawford, Texas Ranch

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07 Jan 2004, 10:18
dj wrote:
Titleist wrote:
b) shows that the natural rate of spontaneous cancer in rats is not too different from the cancer rates in the lab rats that are given high doses of the chemical. Dj, let me know if I'm full of B.S. Thanks.

hmm..now, I understand it. yep, It is B.
this, totally, ran me over..

Awesome - dj - you study too much! how many hours do you sleep? Do you dream GMAT questions?

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SVP
Joined: 30 Oct 2003
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09 Jan 2004, 12:53
Got the same. You can also get it by POE.
Titliest explained it well.

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Intern
Joined: 05 Aug 2014
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Re: A chemical company claims that, since only one of 520 rats [#permalink]

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11 Apr 2016, 04:24
It seems that it is option B, but i'm not sure.

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Re: A chemical company claims that, since only one of 520 rats   [#permalink] 11 Apr 2016, 04:24
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