GRE Prep 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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Wendy, Yvonne, and Elizabeth are baking cookies for a bake s
[#permalink]
23 Apr 2020, 10:16
23 Apr 2020, 10:16
Expert Reply
00:00
Question Stats:
78% (02:06) correct
21% (02:20) wrong based on 32 sessions
Hide Show timer Statistics
Wendy, Yvonne, and Elizabeth are baking cookies for a bake sale. Wendy can bake all of the cookies in 10 hours, Yvonne can bake half of the cookies in 3 hours, and Elizabeth can bake a third of the cookies in 5 hours. If Wendy and Elizabeth bake for 2 hours, how long will it take Yvonne to finish baking the rest of the cookies?
A. 1.8
B. 2
C. 3
D. 3.6
E. 4
A. 1.8
B. 2
C. 3
D. 3.6
E. 4
Retired Moderator
Joined: 16 Apr 2020
Status:Founder & Quant Trainer
Affiliations: Prepster Education
Posts: 1546
Given Kudos: 172
Location: India
WE:Education (Education)
Re: Wendy, Yvonne, and Elizabeth are baking cookies for a bake s
[#permalink]
03 Feb 2021, 04:56
03 Feb 2021, 04:56
Wendy = 10 hours (All cookies)
Yvonne = 6 hours (All cookies)
Elizabeth = 15 hours (All cookies)
In 2 hours;
Wendy made 1/5th of cookies
Elizabeth made 2/15th of cookies
So they together have finished 1/5 + 2/15 of the work i.e. 1/3rd of total work
Now, for Yvonne
Work left = 1 - 1/3 = 2/3
Rate = 1/6
T = W/R = (2/3) / (1/6) = 4 hours
Hence, option E
Yvonne = 6 hours (All cookies)
Elizabeth = 15 hours (All cookies)
In 2 hours;
Wendy made 1/5th of cookies
Elizabeth made 2/15th of cookies
So they together have finished 1/5 + 2/15 of the work i.e. 1/3rd of total work
Now, for Yvonne
Work left = 1 - 1/3 = 2/3
Rate = 1/6
T = W/R = (2/3) / (1/6) = 4 hours
Hence, option E
gmatclubot
Re: Wendy, Yvonne, and Elizabeth are baking cookies for a bake s [#permalink]
03 Feb 2021, 04:56
Moderators:
