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Certain instruments used in veterinary surgery can be made

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Certain instruments used in veterinary surgery can be made [#permalink] New post 08 Feb 2010, 07:18
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30% (03:38) correct 70% (02:10) wrong based on 14 sessions
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.
[Reveal] Spoiler:
B
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Re: 700 + CR [#permalink] New post 08 Feb 2010, 07:28
arghya05 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.
[Reveal] Spoiler:
B


Its B.

The cost of sterilization of 10 complete sets is given as 3.4 times the cost of manufacturing one set.
So the cost of sterilization of 1 complete set is 0.34 times the cost of manufacturing one set.

Hence B.
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Re: 700 + CR [#permalink] New post 08 Feb 2010, 13:55
nverma wrote:
arghya05 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.
[Reveal] Spoiler:
B


Its B.

The cost of sterilization of 10 complete sets is given as 3.4 times the cost of manufacturing one set.
So the cost of sterilization of 1 complete set is 0.34 times the cost of manufacturing one set.

Hence B.


B..for the reason stated above
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Re: 700 + CR [#permalink] New post 08 Feb 2010, 16:20
I agree B is the correct answer. I eyeballed this and some quick long division confirmed B for me.

nylon sterilization requires .34 energy used to manufacturer a single nylon instrument.
sterll sterilization requires .042 energy used to manufacturer a sinlge steele instrument.

However my trouble comes with the assumption that the energy costs and expenditure are the same for nylon and steele. The figures given are in percentages and therefore relative. It could take a lot more energy to produce steel than nylon. Given this possibility the .042 energy needed to sterilize the steel instrument may be a lot more than .34 needed for nylon sterlization. What information did you use to answer B with confindense. Please coorect my logic if it is not correct. Thanks.

nverma wrote:
arghya05 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.
[Reveal] Spoiler:
B


Its B.

The cost of sterilization of 10 complete sets is given as 3.4 times the cost of manufacturing one set.
So the cost of sterilization of 1 complete set is 0.34 times the cost of manufacturing one set.

Hence B.

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Re: 700 + CR [#permalink] New post 08 Feb 2010, 21:29
I got B also before I looked at the OA. I'm proud of myself.
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Re: 700 + CR [#permalink] New post 08 Feb 2010, 23:29
B by POE
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Re: 700 + CR [#permalink] New post 16 Feb 2010, 03:04
(B) More energy was required for each complete sterilization of the nylon instruments than was required to manufacture the nylon instruments.

10 sterilization is 3.4 times the energy to manufacture it so 1 sterilization is .34 which clearly indicates less energy was required to sterilize than manufacture

so my ans is B
Re: 700 + CR   [#permalink] 16 Feb 2010, 03:04
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