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jamesk486
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 Posted: Sat May 19, 2007 7:47 am Post subject: prep question |
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Certain instruments used in veterinary surgery can be made either of stainless steel or of nylon. In a study of such instruments, 10 complete sterilizations of a set of nylon instruments required 3.4 times the amount of energy used to manufacture that set of instruments, whereas 50 complete sterilizations of a set of stainless steel instruments required 2.1 times the amount of energy required to manufacture that set of instruments.
If the statements above are true, each of the following could be true EXCEPT:
(A) The 50 complete sterilizations of nylon instruments used more energy than did the 50 complete sterilizations of the stainless steel instruments.
(B) More energy was required for each complete sterilization of the nylon instruments than was required to manufacture the nylon instruments.
(C) More nylon instruments than stainless steel instruments were sterilized in the study.
(D) More energy was used to produce the stainless steel instruments than was used to produce the nylon instruments.
(E) The total cost of 50 complete sterilizations of the stainless steel instruments was greater than the cost of manufacturing the stainless steel instruments. |
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jayhawk2001
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| Posted: Sat May 19, 2007 8:14 am Post subject: Re: prep question |
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| jamesk486 wrote: | Certain instruments used in veterinary surgery can be made either of stainless steel or of nylon. In a study of such instruments, 10 complete sterilizations of a set of nylon instruments required 3.4 times the amount of energy used to manufacture that set of instruments, whereas 50 complete sterilizations of a set of stainless steel instruments required 2.1 times the amount of energy required to manufacture that set of instruments.
If the statements above are true, each of the following could be true EXCEPT:
(A) The 50 complete sterilizations of nylon instruments used more energy than did the 50 complete sterilizations of the stainless steel instruments.
(B) More energy was required for each complete sterilization of the nylon instruments than was required to manufacture the nylon instruments.
(C) More nylon instruments than stainless steel instruments were sterilized in the study.
(D) More energy was used to produce the stainless steel instruments than was used to produce the nylon instruments.
(E) The total cost of 50 complete sterilizations of the stainless steel instruments was greater than the cost of manufacturing the stainless steel instruments. |
This looks more like a quants question 
My vote for B.
We know 10 iterations took 3.4 times the energy for
nylon equipment. So, each iteration takes .34 times the energy and
hence B cannot be true. |
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Cybermusings
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| Posted: Mon May 21, 2007 11:48 am Post subject: |
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| I think C cannot be inferred from the statement |
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rajesh_ctm
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| Posted: Fri May 25, 2007 8:36 pm Post subject: |
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| Cybermusings wrote: | | I think C cannot be inferred from the statement |
You are correct that C cannot be inferred from the statement, but be careful in reading the instructions. You are not asked whether it can be inferred or not. You are asked if it could be true or not. C <i>could</i> certainly be true. Only B <i>cannot</i> be true. |
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Cybermusings
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| Posted: Sat May 26, 2007 12:03 am Post subject: |
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| Yup.....thanks for pointing out the error! |
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leo
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| Posted: Sun Jun 03, 2007 9:14 am Post subject: |
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| C is the answer |
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rocky
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| Posted: Wed Jun 06, 2007 3:01 am Post subject: |
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Jayhawk I would have agreed with in case "energy" here could be treated as a unit but since questions says "times the amount of energy used to manufacture that set of instruments," So i think C is quite evident from the question straigtway ..
What you say?
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jayhawk2001
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| Posted: Wed Jun 06, 2007 7:31 am Post subject: |
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| rocky wrote: | Jayhawk I would have agreed with in case "energy" here could be treated as a unit but since questions says "times the amount of energy used to manufacture that set of instruments," So i think C is quite evident from the question straigtway ..
What you say? |
I don't think C can be inferred. Take 100 nylon instruments and 2 steel
instruments as an example. All we know is the amount of energy spent
in sterlization relative to the energy spent in manufacturing.
Still sticking with B  |
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