|
|
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.
05 Mar 2026, 22:58
Kudos
Bookmarks
B
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:
88% (01:39) correct
13%
(01:48)
wrong
based on 24
sessions
History
Date
Time
Result
Not Attempted Yet
A company has 48 workers whose average age is 36 years. Eight of the workers are 21-year-old interns. What is the average age of the remaining workers?
A. 38
B. 39
C. 41
D. 42
E. 45
A. 38
B. 39
C. 41
D. 42
E. 45
05 Mar 2026, 23:25
Kudos
Bookmarks
kevincan
This sum can be approached in couple of ways, one such method is using : Mixtures and Alligations.
21. X
36.
8. 40.
(36-21) / (x-36) = (40/8)
15 = 5x - (36*5)
x = 39
Method 2:
All 48 are having an average age of 36.
If 8 are people who are interns of age 21. Then, they hold an excess weight of (36-21)=15 with each of them.
So, the cumulative excess weight has to be = (15*8) = 120.
So, this 120 weight has to be split up between 40 remaining people. So, each of the 40 people get an additional (120/40)=3 extra.
So, the average = 36 + 3 = 39 yrs.
Option B
This can also be solved using traditional approach:
(21*8)+(40*x) = 48*36
Solving we get, x = 39
Option B
