|
|
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
20 Mar 2017, 04:41
Kudos
Bookmarks
A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
71% (01:16) correct
29%
(01:52)
wrong
based on 180
sessions
History
Date
Time
Result
Not Attempted Yet
A mathematics professor can grade 20 exam papers in one day. How long will it take him to grade 30 papers if he is joined a colleague grading twice as fast?
A. 1/2 day
B. 3/4 day
C. 1 day
D. 3/2 days
E. 2 days
A. 1/2 day
B. 3/4 day
C. 1 day
D. 3/2 days
E. 2 days
0akshay0
Joined: 19 Apr 2016
Last visit: 14 Jul 2019
Posts: 192
Own Kudos:
Given Kudos: 59
Location: India
Schools: Jindal '20 Kelley '20 Broad '20 Carey '20 Mays '20
GMAT 1: 570 Q48 V22
GMAT 2: 640 Q49 V28
GPA: 3.5
WE:Web Development (Computer Software)
Schools: Jindal '20 Kelley '20 Broad '20 Carey '20 Mays '20
GMAT 2: 640 Q49 V28
Posts: 192
Kudos:
658
20 Mar 2017, 05:17
Kudos
Bookmarks
Bunuel
professor can grade 20 exam papers in one day which means 10 exam papers in half day
colleague can grade 40 exam papers in one day which means 20 exam papers in half day
so both of them working together will finish grading 30 exam papers in half day
Hence option A is correct
Hit Kudos if you liked it
22 Mar 2017, 09:37
Kudos
Bookmarks
Bunuel
We are given that the rate of a math professor is 20 papers per day. If he were to join with his colleague, who grades twice as fast, or 40 papers per day, the combined rate of the 2 professors would be 20 + 40 = 60 papers per day.
Thus, it would take 30/60 = 1/2 a day to grade 30 papers.
Answer: A
