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A cake is made from 5 cups of batter, which includes f cups
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12 May 2012, 09:27
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A cake is made from 5 cups of batter, which includes f cups of flour and b cups of butter. How many cups of butter are in the cake?
(1) b/3=4/6
(2) f/3=4/6
the official answer is :
Statement (1): Since we can solve for b, this answer is Sufficient. Note that you should not bother to actually solve for b, since it is sufficient to know that you could cross multiply and get to b. You should eliminate choices (B), (C), and (E).
Statement (2): You cannot solve for b, so this answer is Insufficient. Answer Choice (A) is correct.
but I do not understand why, if we are given the value of f in the second stem can't we solve for b? (we now have to equations and two variables) f+b=5 f+2 what am I missing?
Thank you all
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Re: A cake is made from 5 cups of batter, which includes f cups
[#permalink]
12 May 2012, 09:49
mila84 wrote:
A cake is made from 5 cups of batter, which includes f cups of flour and b cups of butter. How many cups of butter are in the cake?
(1) b/3=4/6
(2) f/3=4/6
the official answer is :
Statement (1): Since we can solve for b, this answer is Sufficient. Note that you should not bother to actually solve for b, since it is sufficient to know that you could cross multiply and get to b. You should eliminate choices (B), (C), and (E).
Statement (2): You cannot solve for b, so this answer is Insufficient. Answer Choice (A) is correct.
but I do not understand why, if we are given the value of f in the second stem can't we solve for b? (we now have to equations and two variables) f+b=5 f+2 what am I missing?
Thank you all
Only thing I can think of is - practically, f cups of flour and b cups of butter don't make f+b cups of batter, they mix-up and the mixture will be < f+b. But, if that is the case,this should be part of the official explanation.
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
gmatclubot
Re: A cake is made from 5 cups of batter, which includes f cups [#permalink]