Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized for You
we will pick new questions that match your level based on your Timer History
Track Your Progress
every week, we’ll send you an estimated GMAT score based on your performance
Practice Pays
we will pick new questions that match your level based on your Timer History
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
The Competition Continues - Game of Timers is a team-based competition based on solving GMAT questions to win epic prizes! Starting July 1st, compete to win prep materials while studying for GMAT! Registration is Open! Ends July 26th
Kris-P cereal is 10% sugar by weight, whereas healthier but less delic
[#permalink]
Show Tags
23 Jun 2010, 18:34
7
00:00
A
B
C
D
E
Difficulty:
5% (low)
Question Stats:
75% (01:11) correct 25% (01:27) wrong based on 140 sessions
HideShow timer Statistics
Kris-P cereal is 10% sugar by weight, whereas healthier but less delicious Bran-0 cereal is 2% sugar by weight. To make a delicious and healthy mixture that is 4% sugar, what should be the ratio of Kris-P cereal to Bran-0 cereal, by weight?
Krisp cereal is 10% sugar by weight. Brano cereal is 2% sugar by weight. If you wanted to make the mixture 4% sugar by weight what should the ratio of Krisp to Brano.
Re: Kris-P cereal is 10% sugar by weight, whereas healthier but less delic
[#permalink]
Show Tags
26 Jun 2010, 17:47
6
6
Krispo is 10%. Bruno is 2%.
Question. Suppose we wanted the final solution to be 6% (not 4%). Because 6 is the midpoint between 10 and 2, wouldn't it then be clear that we would need the final solution to be half of each, and that ratio would be 1:1? It is helpful to visualize this on the number line:
2...6...10
Here we want the final solution to be 4%. So it looks like this:
2.4.....10
Because the grand average is skewed towards Bruno, in order to make the final solution 4%, clearly we need more Bruno than Krisp. In fact, because 4 is only 2 units away from 2 but 6 units away from 10, we need 6:2 or 3:1 as much Bruno as Krisp or 1:3 Krisp to Bruno.
____________
TAKEAWAY: The amount of skew is inversely proportional to the relative quantities of each item. If we have two groups, A, and B, then we have ("x" and "y" represent distance from the total average):
Average of A-------x-------Total average------y--------Average of B
(# in A)/(# in B) = y/x
This concept recurs fairly frequenly on the GMAT, especially in Data Sufficiency questions. If x and y are integers, then using this approach is quick and effective.
Re: Kris-P cereal is 10% sugar by weight, whereas healthier but less delic
[#permalink]
Show Tags
27 Jun 2010, 20:21
5
2
Jinglander wrote:
Can someone walk me through this please
Krisp cereal is 10% sugar by weight. Brano cereal is 2% sugar by weight. If you wanted to make the mixture 4% sugar by weight what should the ratio of krisp to brano.
An Easier approach:
Attachment:
pic.JPG [ 3.37 KiB | Viewed 7549 times ]
Hence the ratio of quantities is 2:6=1/3
_________________
If you like my post, consider giving me a kudos. THANKS!
Re: Kris-P cereal is 10% sugar by weight, whereas healthier but less delic
[#permalink]
Show Tags
09 Apr 2016, 00:42
Jinglander wrote:
Krisp cereal is 10% sugar by weight. Brano cereal is 2% sugar by weight. If you wanted to make the mixture 4% sugar by weight what should the ratio of Krisp to Brano.
Say, w1 is the weight krisp, w2 is the weight of Brano
using weihted average formula w1/w2 = (c2 - avg) / (Avg-c1)
w1/w2 = 4-2 / 10-6 = 2/3
So Krisp and brano should be mixed in the ratio of 1/3.
_________________
Kris-P cereal is 10% sugar by weight, whereas healthier but less delic
[#permalink]
Show Tags
28 Dec 2018, 13:00
Kris-P cereal is 10% sugar by weight, whereas healthier but less delicious Bran-0 cereal is 2% sugar by weight. To make a delicious and healthy mixture that is 4% sugar, what should be the ratio of Kris-P cereal to Bran-0 cereal, by weight?
A) 1:3 B) 2:7 C) 2:3 D) 4:5 E) 1:9
_________________
Please provide kudos if you liked my post! I would really like to use the PDF file!!
Re: Kris-P cereal is 10% sugar by weight, whereas healthier but less delic
[#permalink]
Show Tags
28 Dec 2018, 22:45
CLIMBTHELADDER wrote:
Kris-P cereal is 10% sugar by weight, whereas healthier but less delicious Bran-0 cereal is 2% sugar by weight. To make a delicious and healthy mixture that is 4% sugar, what should be the ratio of Kris-P cereal to Bran-0 cereal, by weight?
A) 1:3 B) 2:7 C) 2:3 D) 4:5 E) 1:9
Use weighted average method.. ....B0..A.......KP So 2...4........10 Ratio of KP to B0.....\(\frac{Average-B0}{KP-average}\)=\(\frac{4-2}{10-4}\)=2/6=1/3..
Re: Kris-P cereal is 10% sugar by weight, whereas healthier but less delic
[#permalink]
Show Tags
31 Dec 2018, 01:23
CLIMBTHELADDER wrote:
Kris-P cereal is 10% sugar by weight, whereas healthier but less delicious Bran-0 cereal is 2% sugar by weight. To make a delicious and healthy mixture that is 4% sugar, what should be the ratio of Kris-P cereal to Bran-0 cereal, by weight?
A) 1:3 B) 2:7 C) 2:3 D) 4:5 E) 1:9
Please search before posting. Thank you.
_________________
close
75% (01:11) correct 
