Events & Promotions
|
|
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.
May 2008:00 AM PDT
-08:30 AM PDT
What’s in it for you- Live Profile Evaluation Chat Session with Jenifer Turtschanow, CEO, ARINGO. Come with your details prepared and ARINGO will share insights! Pre-MBA Role/Industry, YOE, Exam Score, C/GPA, ECs Post-MBA Role/ Industry & School List.
Jun 1006:00 AM PDT
-06:15 PM PDT
Register for the GMAT Club Virtual MBA Spotlight Fair – the world’s premier event for serious MBA candidates. This is your chance to hear directly from Admissions Directors at nearly every Top 30 MBA program..
08 Jun 2021, 04:30
Kudos
Bookmarks
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
89% (01:25) correct
11%
(01:53)
wrong
based on 80
sessions
History
Date
Time
Result
Not Attempted Yet
The average of a set of five values is 12. If one number is deleted, the average of the set is increased by 0.6. What is the value of the deleted number?
(A) 8.2
(B) 8.8
(C) 9.2
(D) 9.6
(E) 10.2
(A) 8.2
(B) 8.8
(C) 9.2
(D) 9.6
(E) 10.2
08 Jun 2021, 04:38
Kudos
Bookmarks
Solution:
The number removed has two components -
(1) Contribution to the average with its presence which here is 12 and
(2) Contribution to the group with its presence = 4 X (-)0.6 = -2.4
(Negative sign implies there is a decrease in the average with its presence)
Hence the value deleted = 12 - 2.4 = 9.6
Alternately it is also equal to
5 * 12 - 4*12.6
=60 - 50.4 = 9.6 (option d)
Devmitra Sen
GMAT SME
The number removed has two components -
(1) Contribution to the average with its presence which here is 12 and
(2) Contribution to the group with its presence = 4 X (-)0.6 = -2.4
(Negative sign implies there is a decrease in the average with its presence)
Hence the value deleted = 12 - 2.4 = 9.6
Alternately it is also equal to
5 * 12 - 4*12.6
=60 - 50.4 = 9.6 (option d)
Devmitra Sen
GMAT SME
08 Jun 2021, 04:59
Kudos
Bookmarks
We are not given values of 5 integers, but we are given two averages, so we can find two different sums and the difference between them
Sum = Average * Number of terms
For 5 integers and average of 12, the sum is (12 * 5) i.e 60
For 4 integers and average of 12.6, the sun is (12.6 * 4) i.e 50.4
The difference between two sum will give us the value of removed integer. 60 - 50.4 = 9.6
D is the correct answer
Posted from my mobile device
Sum = Average * Number of terms
For 5 integers and average of 12, the sum is (12 * 5) i.e 60
For 4 integers and average of 12.6, the sun is (12.6 * 4) i.e 50.4
The difference between two sum will give us the value of removed integer. 60 - 50.4 = 9.6
D is the correct answer
Posted from my mobile device
