|
|
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.
24 Oct 2019, 01:39
Kudos
Bookmarks
A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
82% (01:05) correct
18%
(01:35)
wrong
based on 78
sessions
History
Date
Time
Result
Not Attempted Yet
If the average (arithmetic mean) of p and r is n and the average (arithmetic mean) of r and s is 3n, what is the value of s – p?
A. 4n
B. 2n
C. n
D. n + r
E. n + 2r
A. 4n
B. 2n
C. n
D. n + r
E. n + 2r
24 Oct 2019, 03:17
Kudos
Bookmarks
Bunuel
p + r /2 = n
p + r = 2n..................1
again,
r + s/2 = 3n
r + s = 6n ..................2
s + r = 6n
r + p = 2n
...........................deduct
s - p = 4n.
A is the correct answer.
24 Oct 2019, 08:20
Kudos
Bookmarks
Bunuel
\(\frac{p + r}{2} = n\)
Or, \(p + r = 2n\)
Or, \(p = 2n - r\)
And, \(\frac{r + s}{2}= 3n\)
Or, \(r + s = 6n\)
Or, \(s = 6n - r\)
Now, \(s – p = ( 6n - r ) - ( 2n - r )\)
Or, \(s – p = 6n - r - 2n + r\)
Or, \(s – p = 4n\), Answer must be (A)
