BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

mixture problems

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Master | Next Rank: 500 Posts
Posts: 226
Joined: Thu Nov 25, 2010 12:19 am
Thanked: 3 times
Followed by:2 members

mixture problems

by nafiul9090 » Thu Mar 24, 2011 9:49 pm
Kris-P cereal is 10% sugar by weight, whereas healthier but less delicious
Bran-D 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-D cereal, by weight?


in this type of mixture problem, do i have to follow grid solution always.....or is there any other shortcut ??
Top
Source: — Problem Solving |
Master | Next Rank: 500 Posts
Posts: 109
Joined: Mon Jan 10, 2011 3:05 am
Thanked: 8 times
Followed by:7 members
GMAT Score:760

by nikhilsrl » Thu Mar 24, 2011 10:11 pm
Let's take weight of cereal KP is k and that of BD is b as used in the mixture.

k -> 0.1k sugar
b -> 0.02b sugar

On mixing these 2 we get k+b mixture with 0.1k+0.02b sugar

(0.1k+0.02b)/(k+b) = 0.04

k/b = 1/3
Top
User avatar
Master | Next Rank: 500 Posts
Posts: 261
Joined: Wed Mar 31, 2010 8:37 pm
Location: Varanasi
Thanked: 11 times
Followed by:3 members

by ankur.agrawal » Thu Mar 24, 2011 10:14 pm
Kris-P cereal is 10% sugar by weight, whereas healthier but less delicious
Bran-D 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-D cereal, by weight?
Use Alligation Technique :

The proportion needed of each starting percentage is the positive difference between the other 2 percentages.

Wt (10%) = 4-2 = 2

Wt( 2%) = 10-4= 6

Kris p/ Bran D = 2/6 =1/3.

Pls look at the link below:

https://www.beatthegmat.com/mixture-t76266.html

Hope it helps. Please post the OA & source.
Top
Legendary Member
Posts: 1337
Joined: Sat Dec 27, 2008 6:29 pm
Thanked: 127 times
Followed by:10 members

by Night reader » Thu Mar 24, 2011 10:26 pm
have you tried alligation approach

|4-2|=2 assigned to Kris-P cereal
|4-10|=6 assigned to Bran-D cereal
2+6=8; (weight of new mixture/8)*2 gives Kris-P cereal weight and (weight of new mixture/8)*6 gives Bran-D cereal
(2W/8) : (6W/8) = 2W/8 * 8/6W = 1/3

for more help see my small post here https://www.beatthegmat.com/those-of-you ... 71770.html
nafiul9090 wrote:Kris-P cereal is 10% sugar by weight, whereas healthier but less delicious
Bran-D 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-D cereal, by weight?


in this type of mixture problem, do i have to follow grid solution always.....or is there any other shortcut ??
My knowledge frontiers came to evolve the GMATPill's methods - the credited study means to boost the Verbal competence. I really like their videos, especially for RC, CR and SC. You do check their study methods at https://www.gmatpill.com
Top
Master | Next Rank: 500 Posts
Posts: 226
Joined: Thu Nov 25, 2010 12:19 am
Thanked: 3 times
Followed by:2 members

by nafiul9090 » Fri Mar 25, 2011 9:49 am
guys its too good........it takes only few secs to solve ths type of problem...
Top
User avatar
Legendary Member
Posts: 582
Joined: Tue Mar 08, 2011 12:48 am
Thanked: 61 times
Followed by:6 members
GMAT Score:740

by force5 » Fri Mar 25, 2011 10:04 am
IMO 1/3

nafiul there is one thing that caught my eye.
in this type of mixture problem, do i have to follow grid solution always.....or is there any other shortcut ??
you mentioned grid solution? Can you please tell me what approach is that?
Top
Master | Next Rank: 500 Posts
Posts: 226
Joined: Thu Nov 25, 2010 12:19 am
Thanked: 3 times
Followed by:2 members

by nafiul9090 » Sat Mar 26, 2011 12:24 am
@force5....i've found it in MGMAT series...they solved ths type of problem through in table format,,,so i called it grid solution...
Top
User avatar
GMAT Instructor
Posts: 3650
Joined: Wed Jan 21, 2009 4:27 am
Location: India
Thanked: 267 times
Followed by:80 members
GMAT Score:760

by sanju09 » Sat Mar 26, 2011 1:30 am
Image

Try Alligation Rule
nafiul9090 wrote:Kris-P cereal is 10% sugar by weight, whereas healthier but less delicious
Bran-D 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-D cereal, by weight?


in this type of mixture problem, do i have to follow grid solution always.....or is there any other shortcut ??
The mind is everything. What you think you become. -Lord Buddha



Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001

www.manyagroup.com
Top
Post new topic Post Reply
• Page 1 of 1