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Certain instruments used in veterinary surgery can be made

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Re: Certain instruments used in veterinary surgery can be made [#permalink] New post 17 Sep 2012, 04:43
x97agarwal 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: Kaplan OE


Let me try explaining this ...

Equation 1 says:
10 Sterilizations = 3.4 (Manufacturing of Nylon group)
or 1 Sterilizations = .34 (Manufacturing of Nylon group)
or 1 Sterilizations = 34% (Manufacturing of Nylon group)

Equation 2 says:
50 Sterilizations = 2.1 (Manufacturing of Steel group)
or 1 Sterilizations = 2.1/50 (Manufacturing of Nylon group)
1 Sterilizations = 4% (Manufacturing of Nylon group)

That's all we know. No relationship between the cost of Nylon and Steel group defined. Neither their number is certain.

A) As stated above, we don't know this relation so no comments.
C) As stated above, we don't know this relation so no comments.
D) As stated above, we don't know this relation so no comments.
E) Yes, we know this is true from equation 2. If 50 Sterilizations equals 2.1 times Manu, then 50 S must be bigger than 1 times Manu for sure ..

Correct Answer: B) In case of Nylon, the option suggests 1 S > 100% Manu; however, we know that 1 S just equals 34% manu and cant be bigger than that.
B.T.W it took me more than 5 mins to get to this result so don't worry if you couldn't see this outright ..

If you like my post, kudos me .. this will be my 1st and I need 25 of them for GC tests access !
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Re: Certain instruments used in veterinary surgery can be made [#permalink] New post 15 Sep 2013, 18:38
As per the passage 10 Nylon sterilizations = 3.4 ( Cost of manufacturing one set of nylon instruments ) .

Therefore 1 Nylon sterilization = 0.34 ( Cost of manufacturing one set of nylon instruments ) .
Hence Goes against B !!
B is your answer
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Re: Certain instruments used in veterinary surgery can be made [#permalink] New post 19 Sep 2013, 10:14
I have chose E because the passage do not mention costs at all... But you were right, the question ask for something that is NOT true and only choic B is wrong (opposite of what it should be)!
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Re: Certain instruments used in veterinary surgery can be made [#permalink] New post 26 Nov 2013, 08:08
+1 for B....

Whats the source of this question?
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Re: Certain instruments used in veterinary surgery can be made [#permalink] New post 28 Aug 2014, 07:51
Based on the info given in the passage, we can create a table like shown below.

Energy used to manufacture:
Nylon = N and SS = S
Energy used to Sterilize each set:
Nylon = (3.4 x N)/10
SS = (2.1 x S)/50

Question asks for "What could be true EXCEPT"

Answer choice B states that (3.4 x N)/10 > N which is mathematically incorrect. Thus B can never be true and the answer.
Re: Certain instruments used in veterinary surgery can be made   [#permalink] 28 Aug 2014, 07:51
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