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# Kobayashi coffee has more caffeine than Marlowe Select coffee. But

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Intern
Joined: 07 Sep 2012
Posts: 6
Kobayashi coffee has more caffeine than Marlowe Select coffee. But  [#permalink]

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Updated on: 30 Apr 2018, 21:51
3
00:00

Difficulty:

25% (medium)

Question Stats:

71% (01:44) correct 29% (01:46) wrong based on 287 sessions

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Kobayashi coffee has more caffeine than Marlowe Select coffee. But since Chula Vista coffee has more caffeine than Valentino coffee, it follows that Kobayashi coffee has more caffeine than Valentino coffee.

Any of the following, if introduced into the argument as an additional premise, makes the argument above logically correct EXCEPT?

(A) Marlowe Street coffee has more caffeine than Valentino coffee.
(B) Marlowe Street corree has more caffeine than Chula Vista coffee.
(C) Marlowe Street and Chula Vista coffees have the same amount of caffeine.
(D) Kobayashi and Chula Vista coffees have the same amount of caffeine.
(E) Chula Vista coffee has more caffeine than Kobayashi coffee.

Originally posted by rahulbsai on 30 Sep 2012, 07:29.
Last edited by Bunuel on 30 Apr 2018, 21:51, edited 1 time in total.
Renamed the topic, edited the question and added the OA.
Intern
Joined: 07 Sep 2012
Posts: 6
Re: Kobayashi coffee has more caffeine than Marlowe Select coffee. But  [#permalink]

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30 Sep 2012, 07:31
rahulbsai wrote:
Kobayashi coffee has more caffeine than Marlowe Select coffee. But since Chula Vista coffee has more caffeine than Valentino coffee, it follows that Kobayashi coffee has more caffeine than Valentino coffee.

Any of the following, if introduced into the argument as an additional premise, makes the argument above logically correct EXCEPT?

(A) Marlowe Street coffee has more caffeine than Valentino
coffee.
(B) Marlowe Street corree has more caffeine than Chula Vista
coffee.
(C) Marlowe Street and Chula Vista coffees have the same
amount of caffeine.
(D) Kobayashi and Chula Vista coffees have the same amount of
caffeine.
(E) Chula Vista coffee has more caffeine than Kobayashi coffee.

I think the answer is E. I got K>M>C>V and only 5th option(C>K) will weaken the argument. Please let me know if this approach is correct. Thanks.
Manager
Status: faciendo quod indiget fieri
Joined: 13 Mar 2012
Posts: 70
Re: Kobayashi coffee has more caffeine than Marlowe Select coffee. But  [#permalink]

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30 Sep 2012, 07:55
Another support for E, as thats the only one which logically supports this. If we know c>k we dont know whether it is :

c>v>k
or
C>k>v

Hence doesn't make the argument logically correct
Manager
Joined: 06 May 2012
Posts: 57
Re: Kobayashi coffee has more caffeine than Marlowe Select coffee. But  [#permalink]

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30 Sep 2012, 11:09
E is the only choice when introduced as additional premise will invalidate the conclusion - it follows that Kobayashi coffee has more caffeine than Valentino coffee
Senior Manager
Joined: 24 Aug 2009
Posts: 457
Schools: Harvard, Columbia, Stern, Booth, LSB,
Re: Kobayashi coffee has more caffeine than Marlowe Select coffee. But  [#permalink]

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19 Mar 2013, 02:12
1
Kobayashi coffee has more caffeine than Marlowe Select coffee. But since Chula Vista coffee has more caffeine than Valentino coffee, it follows that Kobayashi coffee has more caffeine than Valentino coffee.
Any of the following, if introduced into the argument as an additional premise, makes the argument above logically correct EXCEPT?
(A) Marlowe Street coffee has more caffeine than Valentino coffee.
(B) Marlowe Street corree has more caffeine than Chula Vista coffee.
(C) Marlowe Street and Chula Vista coffees have the same amount of caffeine.
(D) Kobayashi and Chula Vista coffees have the same amount of caffeine.
(E) Chula Vista coffee has more caffeine than Kobayashi coffee.

% of Caffeine in Kobayashi coffee= K
% of Caffeine in Marlowe Select coffee = M
% of Caffeine in Chula Vista coffee = C
% of Caffeine in Valentino coffee = V
Premise 1 - K > M
Premise 2 - C > V
Conclusion - K > V
Option A - M > V - Concurs with the conclusion
Option B - M > C - Concurs with the conclusion
Option C - M = C - Concurs with the conclusion
Option D - K = C - Concurs with the conclusion
Option E - C > K - Does not Concurs with the conclusion because if C >K, then we can not be sure whether K>V because two cases are possible
C > V > K
C > K > V

Thus E is the correct answer.
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Director
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Re: Kobayashi coffee has more caffeine than Marlowe Select coffee. But  [#permalink]

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19 Mar 2013, 03:26
Only E stands here....
given K>M
C>V
so K>V
look for option that says
M=C
M>V
K>C

Consider kudos if my post helps!!

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Re: Kobayashi coffee has more caffeine than Marlowe Select coffee. But  [#permalink]

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30 Apr 2018, 13:08
Am i the only one who thinks D is right ?
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Re: Kobayashi coffee has more caffeine than Marlowe Select coffee. But  [#permalink]

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10 Sep 2018, 03:45
Nightmare007 wrote:
Am i the only one who thinks D is right ?

Nightmare007
Even I had picked D, but on careful observation I realized its not the correct answer,
We are given that K>M, C>V, now substitute K = C in C>V, we get K>V,
So D is incorrect.

E says - Chula Vista coffee has more caffeine than Kobayashi coffee.
i.e C>K
But we know K>M and C>V, now if C>K, we cannot conclude that K>V.
Hope this helped.
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Re: Kobayashi coffee has more caffeine than Marlowe Select coffee. But   [#permalink] 10 Sep 2018, 03:45
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