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# Certain instruments used in veterinary surgery can be made

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Senior Manager
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03 Dec 2006, 09:46
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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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Senior Manager
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03 Dec 2006, 10:37
B

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03 Dec 2006, 10:55
C)
_________________

Best Regards,

Paul

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Manager
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03 Dec 2006, 11:04
B for me, energy required for 1 sterlization is 3.4E/10

hence less than required for manufacturing

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Senior Manager
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Re: CR on veterinary surgery ! [#permalink]

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03 Dec 2006, 15:35
jyotsnasarabu 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.
3.4E/10 < E, so B can never be true!
(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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Manager
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03 Dec 2006, 16:55
C for me

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Director
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03 Dec 2006, 22:59
It's B.

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Manager
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04 Dec 2006, 01:10
Tricky, but C

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Manager
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04 Dec 2006, 02:16
IT IS B.

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Director
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04 Dec 2006, 04:00
Viperace wrote:
Tricky, but C

Can you please explain how it can be C?

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Director
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Re: CR on veterinary surgery ! [#permalink]

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04 Dec 2006, 04:21
C can be true. A set of nylon instruments contained 10 instrument, and a set of stainless contained 1 instruments. total stainless sterilized : 50*1=50 and nylon sterilized : 10*10=100. That doesn't contradict the premises that energie(steli 10 sets nylon)=3,4*energy to produce one set of nylon, nor energie(steril 50 sets stainless)=2,1*energy to produce one set of stainless.

Go for B.

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Senior Manager
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04 Dec 2006, 04:24
guys the OA is B!

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04 Dec 2006, 04:24
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