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Standard aluminum soft-drink cans do not vary

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Standard aluminum soft-drink cans do not vary [#permalink]

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Standard aluminum soft-drink cans do not vary in the amount of aluminum that they contain. Fifty percent of the aluminum contained in a certain group (M) of standard aluminum soft-drink cans was recycled from another group (L) of used, standard aluminum softdrink cans. Since all the cans in L were recycled into cans in M and since the amount of material other than aluminum in an aluminum can is negligible, it follows that M contains twice as many cans as L.

The conclusion of the argument follows logically if which one of the following is assumed?

(A) The aluminum in the cans of M cannot be recycled further.
(B) Recycled aluminum is of poorer quality than unrecycled aluminum.
(C) All of the aluminum in an aluminum can is recovered when the can is recycled.
(D) None of the soft-drink cans in group L had been made from recycled aluminum.
(E) Aluminum soft-drink cans are more easily recycled than are soft-drink cans made from other materials.

Source: LSAT
[Reveal] Spoiler: OA

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Last edited by broall on 18 Sep 2017, 17:55, edited 1 time in total.
Reformatted question

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Re: Standard aluminum soft-drink cans do not vary [#permalink]

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New post 04 Dec 2013, 23:53
creativeminddu wrote:
Standard aluminum soft-drink cans do not vary in the amount of aluminum that they contain. Fifty percent of the aluminum contained in a certain group (M) of standard aluminum soft-drink cans was recycled from another group (L) of used, standard aluminum softdrink cans. Since all the cans in L were recycled into cans in M and since the amount of material other than aluminum in an aluminum can is negligible, it follows that M contains twice as many cans as L.
The conclusion of the argument follows logically if which one of the following is assumed?
(A) The aluminum in the cans of M cannot be recycled further.
(B) Recycled aluminum is of poorer quality than unrecycled aluminum.
(C) All of the aluminum in an aluminum can is recovered when the can is recycled.
(D) None of the soft-drink cans in group L had been made from recycled aluminum.
(E) Aluminum soft-drink cans are more easily recycled than are soft-drink cans made from
other materials.


There is a wording error in the question above. The conclusion wording should have been "it follows that M contains twice as many aluminium as in L."

Above question is an Assumption question. Here, the conclusion is talking about the aluminium content. So, we need to look at options that talk about it.
Clearly B,D and E are out of scope. We are left with A and C where, C is the clear winner.
So, the answer should be C.

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Re: Standard aluminum soft-drink cans do not vary [#permalink]

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New post 05 Dec 2013, 00:13
creativeminddu wrote:
Standard aluminum soft-drink cans do not vary in the amount of aluminum that they contain. Fifty percent of the aluminum contained in a certain group (M) of standard aluminum soft-drink cans was recycled from another group (L) of used, standard aluminum softdrink cans. Since all the cans in L were recycled into cans in M and since the amount of material other than aluminum in an aluminum can is negligible, it follows that M contains twice as many cans as L


1. Standard cans do not vary in amount of Aluminium

2. 50% aluminium in M is recycled from L

3. All Cans of L are recycled to form M ----------> Amt of other material is less ---------- > M contains 200% Aluminium as L




The conclusion of the argument follows logically if which one of the following is assumed? - So this is basically an assumption question.

(A) The aluminium in the cans of M cannot be recycled further.

Nowehere it is mentioned that it can't be recycled further , OUT OF SCOPE.

(B) Recycled aluminum is of poorer quality than unrecycled aluminum.

OUT OF SCOPE - Its clearly mentioned that Cans of M are made from Recycled Cans of L

(C) All of the aluminum in an aluminum can is recovered when the can is recycled.

True , Aluminium can be recovered from Cans of L and it is used for making Cans of M. However the Underlined part seems too much may be 80% of Aluminium can be recovered.

Let's keep it aside and check the other options.

(D) None of the soft-drink cans in group L had been made from recycled aluminum.

Over emphasises , the situation might be that recycled aluminium of Can L is used for its own use as well as for Cans M. The sentence assumes too much and changes the direction of the logic presented in the passage.

(E) Aluminum soft-drink cans are more easily recycled than are soft-drink cans made from other materials.

OUT OF SCOPE - We have information only about aluminium cans ...



Among the given answer choices (C) is the best , so the answer is (C)
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Re: Standard aluminum soft-drink cans do not vary [#permalink]

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New post 21 Apr 2017, 08:48
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Standard aluminum soft-drink cans do not vary [#permalink]

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New post 22 Sep 2017, 08:43
this is a common in gmat, test takers should learn this. That is, the group is twice, or 3 times as many as the other group.

Another way is to Uuse POE, only C is left.

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Re: Standard aluminum soft-drink cans do not vary   [#permalink] 22 Sep 2017, 08:43
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