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Another Mixture Problem

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by GMAT12 » Mon May 25, 2009 10:21 am
Coffee World blends two types of coffee, putting in 2 parts of a 33 cent a pound grade to 1 part of a 24 cent a pound grade. If the mixture is changed to 1 part of a 33 cent a pound grade to 1 part a 24 cent a pound grade ,how much will Coffee World save in blending 100 pounds?

a) $0.90
b) $1.00
c) $3.00
d) $8.00
e) $9.00
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by tdadic84 » Mon May 25, 2009 10:29 am
is the answer C???

originally....

66.66 X 0.33$ = 22 $
33.33 X 0.24 = 8$

Total 30


new blend

33.33 X 0.33 = 11$
66.66 X 0.24 = 16$

Total 27$

Therefore would save a total of 3$...

hence c
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by cramya » Mon May 25, 2009 10:50 am
The question as is the answer would be 1.50 dollars.

If the question was 1 part of 33 and 2 parts 24 then the answer would be 3.

Please check the question after posting to ensure its correctness.

Regards,
CR
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by tdadic84 » Mon May 25, 2009 10:57 am
oh..just realized it said 1 to 1....i assumed it was 1 to 2 with the new mixture...

either a typo by the poster..or i mis-read....which cannot be good seeing as how my exam is in 10 days :)
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by dumb.doofus » Mon May 25, 2009 10:59 am
I am getting something that is not part of the answer choices..

1. The ratio is of 2:1

so,

(2/3)*100*(33/100) + (1/3)*100*(24/100) = 30 -------------- (1)

2. ratio is 1:1

(1/2)*100*(33/100) + (1/2)*100*(24/100) = 57/2 ---------- (2)

(1) - (2) = 3/2 = 1.5
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by cramya » Mon May 25, 2009 11:10 am
either a typo by the poster..or i mis-read....which cannot be good seeing as how my exam is in 10 days
Trust me we all do it no matter how many probs we solve :D

Don't worry u will do fine. Keep up ur confidence.

DOUBLE CHECK THE ANSWER TO ENSURE WE HAVE ANSWERED WHAT THE PROBLEM IS ASKING FOR is another big takeaway for all problems in addition to noting down correctly what's given especially on the GMAT as it tends to trick us that way....

Good luck!
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by GMAT12 » Mon May 25, 2009 11:13 am
well actually I got that answer too & I thought I didn't get the question right. That's why I've posted the problem....may be a printing mistake.

Anyway I'm really sorry for the inconvenience :oops:
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