November 17, 2018 November 17, 2018 07:00 AM PST 09:00 AM PST Nov. 17, 7 AM PST. Aiming to score 760+? Attend this FREE session to learn how to Define your GMAT Strategy, Create your Study Plan and Master the Core Skills to excel on the GMAT. November 17, 2018 November 17, 2018 09:00 AM PST 11:00 AM PST Join the Quiz Saturday November 17th, 9 AM PST. The Quiz will last approximately 2 hours. Make sure you are on time or you will be at a disadvantage.
Author 
Message 
TAGS:

Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 50619

A bakery opened yesterday with its daily supply of 40 dozen
[#permalink]
Show Tags
13 Aug 2012, 06:04
Question Stats:
96% (00:39) correct 4% (00:41) wrong based on 1745 sessions
HideShow timer Statistics



Math Expert
Joined: 02 Sep 2009
Posts: 50619

Re: A bakery opened yesterday with its daily supply of 40 dozen
[#permalink]
Show Tags
13 Aug 2012, 06:04



Manager
Joined: 30 Sep 2009
Posts: 93

Re: A bakery opened yesterday with its daily supply of 40 dozen
[#permalink]
Show Tags
13 Aug 2012, 07:18
answer is D ...4 dozens ....
half sold by noon > 20 dozens (20 *12 =240) remaining > 20 dozens i.e 240 eggs... 80% sold > 80*240/100 =192 eggs remaining 20 % > 48 eggs (4 dozens ) > answer



Manager
Joined: 28 Sep 2011
Posts: 61
Location: United States
GMAT 1: 520 Q34 V27 GMAT 3: 690 Q47 V38
GPA: 3.01
WE: Information Technology (Commercial Banking)

Re: A bakery opened yesterday with its daily supply of 40 dozen
[#permalink]
Show Tags
13 Aug 2012, 08:21
I'm also getting D, but the OA is E. Looking forward to the explanation.



Manager
Joined: 30 Sep 2009
Posts: 93

Re: A bakery opened yesterday with its daily supply of 40 dozen
[#permalink]
Show Tags
13 Aug 2012, 08:26
Answer has to be 4 dozens, May be the OA is wrong



Math Expert
Joined: 02 Sep 2009
Posts: 50619

Re: A bakery opened yesterday with its daily supply of 40 dozen
[#permalink]
Show Tags
13 Aug 2012, 09:00



Math Expert
Joined: 02 Sep 2009
Posts: 50619

Re: A bakery opened yesterday with its daily supply of 40 dozen
[#permalink]
Show Tags
17 Aug 2012, 00:07



Intern
Joined: 02 Aug 2013
Posts: 15

Re: A bakery opened yesterday with its daily supply of 40 dozen
[#permalink]
Show Tags
02 Aug 2013, 11:56
worst question ever i thought the bakery would make rolls during the day. what kind of bakery doesn't bake their own rolls?



Manager
Status: Please do not forget to give kudos if you like my post
Joined: 19 Sep 2008
Posts: 97
Location: United States (CA)

Re: A bakery opened yesterday with its daily supply of 40 dozen
[#permalink]
Show Tags
23 Jan 2014, 11:03
isn't 40 dozen rolls mean 40x12? If i go this bakery and say give me half a dozen rolls, they will charge me for 6 rolls. not 0.5 rolls. So the total rolls should be 40X12. half rolls sold by noon mean remaining is 20x12. 80% by closing means, 0.2x20x12 remaining = 48. whats the trick here to choose value as 40 as a starting value for total rolls. BTW, i choose D by ignoring "dozen" in the problem by just looking at the answer choices.
_________________
Please Help with Kudos, if you like my post.



Veritas Prep GMAT Instructor
Joined: 16 Oct 2010
Posts: 8537
Location: Pune, India

Re: A bakery opened yesterday with its daily supply of 40 dozen
[#permalink]
Show Tags
23 Jan 2014, 20:16
pradeepss wrote: isn't 40 dozen rolls mean 40x12? If i go this bakery and say give me half a dozen rolls, they will charge me for 6 rolls. not 0.5 rolls. So the total rolls should be 40X12. half rolls sold by noon mean remaining is 20x12. 80% by closing means, 0.2x20x12 remaining = 48.
whats the trick here to choose value as 40 as a starting value for total rolls.
BTW, i choose D by ignoring "dozen" in the problem by just looking at the answer choices. Read the question again: "How many dozen rolls had not been sold when the bakery closed yesterday?" They want the answer in dozen rolls. You get the answer as 4 dozen rolls.
_________________
Karishma Veritas Prep GMAT Instructor
Learn more about how Veritas Prep can help you achieve a great GMAT score by checking out their GMAT Prep Options >
GMAT selfstudy has never been more personalized or more fun. Try ORION Free!



Intern
Joined: 27 Dec 2013
Posts: 32
Concentration: Finance, General Management

Re: A bakery opened yesterday with its daily supply of 40 dozen
[#permalink]
Show Tags
23 Jan 2014, 21:50
Bunuel wrote: A bakery opened yesterday with its daily supply of 40 dozen rolls. Half of the rolls were sold by noon, and 80 percent of the remaining rolls were sold between noon and closing time. How many dozen rolls had not been sold when the bakery closed yesterday? (A) 1 (B) 2 (C) 3 (D) 4 (E) 5 Practice Questions Question: 19 Page: 154 Difficulty: 550 40/2 * 20/100 = 4 Option D
_________________
Kindly consider for kudos if my post was helpful!



Manager
Joined: 07 Apr 2014
Posts: 115

Re: A bakery opened yesterday with its daily supply of 40 dozen
[#permalink]
Show Tags
09 Sep 2014, 22:53
Bunuel wrote: A bakery opened yesterday with its daily supply of 40 dozen rolls. Half of the rolls were sold by noon, and 80 percent of the remaining rolls were sold between noon and closing time. How many dozen rolls had not been sold when the bakery closed yesterday? (A) 1 (B) 2 (C) 3 (D) 4 (E) 5 Practice Questions Question: 19 Page: 154 Difficulty: 550 half of the 40 dozen roll = 20 80% of 20 = 20*0.8 = 16 2016 =4 , which is not sold.



Intern
Joined: 06 Nov 2014
Posts: 10

Re: A bakery opened yesterday with its daily supply of 40 dozen
[#permalink]
Show Tags
15 Nov 2014, 02:17
40*12 to start with 20*12 sold by noon (20/5*4)* 12= 16*12 sold by closing time (4/5 is 80%) (20+16)*12= 36*12 sold 4*12 left = 4 dozen



Senior Manager
Status: Math is psychological
Joined: 07 Apr 2014
Posts: 421
Location: Netherlands
GMAT Date: 02112015
WE: Psychology and Counseling (Other)

Re: A bakery opened yesterday with its daily supply of 40 dozen
[#permalink]
Show Tags
11 Jan 2015, 08:27
Yes the "trick" is that they ask for dozen rolls. It is logical to calculaye the 40 dozens in the begining. And since it goes on exlpaining how many of the "rolls" were sold during the day, you sort of forget that it asks about dozens again in the end.
But still, if you do 48/12= 4, you end up with the correct answer.



Intern
Joined: 12 Nov 2015
Posts: 48

Re: A bakery opened yesterday with its daily supply of 40 dozen
[#permalink]
Show Tags
21 Dec 2015, 08:08
easy question.
50% > 20, 80% of 20 = 16.
402016 =4 =answer



Target Test Prep Representative
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 4170
Location: United States (CA)

Re: A bakery opened yesterday with its daily supply of 40 dozen
[#permalink]
Show Tags
24 May 2016, 09:44
Bunuel wrote: A bakery opened yesterday with its daily supply of 40 dozen rolls. Half of the rolls were sold by noon, and 80 percent of the remaining rolls were sold between noon and closing time. How many dozen rolls had not been sold when the bakery closed yesterday?
(A) 1 (B) 2 (C) 3 (D) 4 (E) 5 The bakery began the day with 40 dozen rolls. Half of the rolls were sold by noon, so we know by noon we had 40 x ½ = 20 dozen rolls sold. It follows that there were 20 dozen rolls remaining between noon and closing time. We are next given that 80% of the remaining rolls were sold between noon and closing time. Since 80% were sold, 20% were left. This means: rolls left when the bakery closed = 0.2 x 20 = 4 dozen rolls Answer: D
_________________
Scott WoodburyStewart
Founder and CEO
GMAT Quant SelfStudy Course
500+ lessons 3000+ practice problems 800+ HD solutions



Intern
Joined: 20 Oct 2015
Posts: 37

Re: A bakery opened yesterday with its daily supply of 40 dozen
[#permalink]
Show Tags
05 Jul 2016, 03:13
Bunuel wrote: A bakery opened yesterday with its daily supply of 40 dozen rolls. Half of the rolls were sold by noon, and 80 percent of the remaining rolls were sold between noon and closing time. How many dozen rolls had not been sold when the bakery closed yesterday? (A) 1 (B) 2 (C) 3 (D) 4 (E) 5 Practice Questions Question: 19 Page: 154 Difficulty: 550 40*50%=20 20*80%=16 2016=4



Intern
Joined: 13 Oct 2018
Posts: 9

Re: A bakery opened yesterday with its daily supply of 40 dozen
[#permalink]
Show Tags
31 Oct 2018, 23:31
A half dozen was sold by noon = 40/2 = 20 The remaining half dozen = 20 Now, 80% of the remaining half dozen is also sold = 80%*20 = 16dozen How many were not sold?
We had total = 20 = 100% 80% were sold = 80% Remaining = 20%
100% of 20 = 20 10% of 20 = 2 20% of 20 = 4 i.e. 2+2
The answer choice is D.




Re: A bakery opened yesterday with its daily supply of 40 dozen &nbs
[#permalink]
31 Oct 2018, 23:31






