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To prevent harbor porpoises from getting tangled in its nets [#permalink]
 01 Apr 2012, 08:34
Question Stats:
86% (01:48) correct
13% (01:14) wrong based on 37 sessions
To prevent harbor porpoises from getting tangled in its nets and suffocating, a fishing company installed acoustic alarms on all its boats that fish in waters off Massachusetts. The sound emitted temporarily disorients the porpoises and frightens them away. Since the installation of the alarms, the average number of porpoises caught in the company's nets has dropped from eight to one per month. The alarms, therefore, are saving the lives of harbor porpoises in those waters. Which of the following is an assumption on which the argument depends? A. The use of acoustic alarms increases the number of commercial fish caught by the fishing company's boats. B. When disoriented, harbor porpoises are not significantly more likely to be killed by other boats. C. Environmentalists advocate the use of acoustic alarms as a means of protecting the harbor porpoise population. D. The alarms were installed at the time of year when harbor porpoises are most plentiful in the Massachusetts waters. E. The cost of installing acoustic alarms on fishing boats is less than the cost of repairing nets damaged by harbor porpoises.
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Re: Help, please, with assumption question!!! [#permalink]
01 Apr 2012, 08:35
HELP!
Can you explain me answers B and D?
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Re: Help, please, with assumption question!!! [#permalink]
01 Apr 2012, 14:12
commandos1985 wrote: HELP!
Can you explain me answers B and D? B is correct because it addresses the issue of alarm saving lives. D might serve as an explanation for why the company has caught less of porpoises, but does not address the saving their lives part.
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Senior Manager
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Re: Help, please, with assumption question!!! [#permalink]
03 Apr 2012, 03:00
Except B rest options are just irrelevant
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Re: Help, please, with assumption question!!! [#permalink]
03 Apr 2012, 03:47
Plz give more explanations.........still not clear why not D.......
Doesn't saved from being suffocated means aved from being killed.
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Re: Help, please, with assumption question!!! [#permalink]
09 Apr 2012, 23:56
1
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I doubt if this is a text from GMAT.
I feel comfortable to assume that such a question is a creation of GMAT Tutors/ Private Organizations that prepare these questions for students benefit.
If this is infact a GMAT question, i expect it to be more precise as in option B.
There is an ambiguity here, other boats?? -- what are other boats?? -- 1)other boats of the same company or 2)other boats of different company that did not install the alarms??
Depending on the above, i would go with D if 1, i.e the other boats are mentioned as bpats of the same company, bcoz in such a case, B looses its importance as the average is already mentioned down to 1 from 8, so D is better as it supports the facts with its info.
But if other boats mean boats of other companies, I would go with B........ again if it says that other boats have no alarms installed on it.
This is my opinion, and if there are any experts around here, please thrash me if you feel my reasoning is wrong.
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Re: Help, please, with assumption question!!!
[#permalink]
09 Apr 2012, 23:56
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