Last visit was: 18 May 2024, 00:03 It is currently 18 May 2024, 00:03
Close
GMAT Club Daily Prep
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.
Close
Request Expert Reply
Confirm Cancel
SORT BY:
Date
Director
Director
Joined: 14 Jul 2010
Status:No dream is too large, no dreamer is too small
Posts: 969
Own Kudos [?]: 4954 [32]
Given Kudos: 690
Concentration: Accounting
Send PM
Most Helpful Reply
User avatar
Retired Moderator
Joined: 20 Dec 2010
Posts: 1113
Own Kudos [?]: 4711 [7]
Given Kudos: 376
Send PM
General Discussion
User avatar
Manager
Manager
Joined: 19 Apr 2011
Posts: 59
Own Kudos [?]: 9 [1]
Given Kudos: 2
Send PM
VP
VP
Joined: 07 Dec 2014
Posts: 1071
Own Kudos [?]: 1576 [1]
Given Kudos: 27
Send PM
Re: A certain candy manufacturer reduced the weight of Candy Bar M by 20 [#permalink]
1
Bookmarks
Baten80 wrote:
A certain candy manufacturer reduced the weight of Candy Bar M by 20 percent buy left the price unchanged. What was the resulting percent increase in the price per ounce of Candy Bar M?

a)5%
b)10
c)15%
d)20%
e)25%


(p/4)/(p/5)=5/4=125%
25% increase in price per ounce
E
Target Test Prep Representative
Joined: 04 Mar 2011
Status:Head GMAT Instructor
Affiliations: Target Test Prep
Posts: 3042
Own Kudos [?]: 6353 [1]
Given Kudos: 1646
Send PM
Re: A certain candy manufacturer reduced the weight of Candy Bar M by 20 [#permalink]
1
Bookmarks
Expert Reply
Baten80 wrote:
A certain candy manufacturer reduced the weight of Candy Bar M by 20 percent buy left the price unchanged. What was the resulting percent increase in the price per ounce of Candy Bar M?

a)5%
b)10
c)15%
d)20%
e)25%


We are given that a certain candy manufacturer reduced the weight of Candy Bar M by 20 percent but left the price unchanged. If we let w = the original weight of the bar, the new weight is 0.8w = 4w/5. If we let p = the original price of the bar we know:

p/w = the original price per ounce of the bar

p/(4w/5) = 5p/4w = the new price per ounce of the bar

Finally we can determine the resulting percent increase in the price per bar due to the change:

[5p/4w - p/w]/[p/w] x 100

[5p/4w - 4p/4w]/[p/w] x 100

[p/4w]/[p/w] x 100

p/4w x w/p x 100 = 1/4 x 100 = 25%

Answer: E
Director
Director
Joined: 24 Oct 2016
Posts: 581
Own Kudos [?]: 1334 [1]
Given Kudos: 143
GMAT 1: 670 Q46 V36
GMAT 2: 690 Q47 V38
GMAT 3: 690 Q48 V37
GMAT 4: 710 Q49 V38 (Online)
Send PM
Re: A certain candy manufacturer reduced the weight of Candy Bar M by 20 [#permalink]
1
Bookmarks
Baten80 wrote:
A certain candy manufacturer reduced the weight of Candy Bar M by 20 percent buy left the price unchanged. What was the resulting percent increase in the price per ounce of Candy Bar M?

a)5%
b)10
c)15%
d)20%
e)25%


Let initial weight = 5
New price = 5 * 0.8 = 4

New Change in $/lb = ?
Original = $/5
New = $/4

Change = (New - Old)/Old = ($/4 - $/5)/$/5 = $/4 = 25%

ANSWER: E
Tutor
Joined: 16 Oct 2010
Posts: 14891
Own Kudos [?]: 65340 [0]
Given Kudos: 431
Location: Pune, India
Send PM
A certain candy manufacturer reduced the weight of Candy Bar M by 20 [#permalink]
Expert Reply
MHIKER wrote:
A certain candy manufacturer reduced the weight of Candy Bar M by 20 percent buy left the price unchanged. What was the resulting percent increase in the price per ounce of Candy Bar M?

(A) 5%
(B) 10%
(C) 15%
(D) 20%
(E) 25%



Price = Weight * Price per ounce

If weight is decreased by 20% (multiplied by 4/5) but overall price is kept same, then price per ounce must have been multiplied by (5/4).

\(Price = (\frac{4}{5}) * Weight * \frac{Price}{ounce} * (\frac{5}{4})\)

When you multiply something by 5/4, you are essentially increasing it by 25%.

Answer (E)
User avatar
Non-Human User
Joined: 09 Sep 2013
Posts: 33057
Own Kudos [?]: 828 [0]
Given Kudos: 0
Send PM
Re: A certain candy manufacturer reduced the weight of Candy Bar M by 20 [#permalink]
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
GMAT Club Bot
Re: A certain candy manufacturer reduced the weight of Candy Bar M by 20 [#permalink]
Moderators:
Math Expert
93334 posts
Senior Moderator - Masters Forum
3137 posts