|
|
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.
Updated on: 24 Jul 2019, 05:02
Originally posted by Bunuel on 09 Apr 2019, 23:45.
Last edited by Sajjad1994 on 24 Jul 2019, 05:02, edited 1 time in total.
Last edited by Sajjad1994 on 24 Jul 2019, 05:02, edited 1 time in total.
Added Source.
Kudos
Bookmarks
C
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:
88% (01:35) correct
13%
(02:19)
wrong
based on 40
sessions
History
Date
Time
Result
Not Attempted Yet
In a set of three numbers, the average of first two numbers is 2, the average of the last two numbers is 3, and the average of the first and the last numbers is 4. What is the average of three numbers?
(A) 2
(B) 2.5
(C) 3
(D) 3.5
(E) 4
(A) 2
(B) 2.5
(C) 3
(D) 3.5
(E) 4
Source: Nova GMAT
Difficulty Level: 600
Difficulty Level: 600
10 Apr 2019, 00:37
Kudos
Bookmarks
Bunuel
1st number = x
2 nd number = y
3rd number = z
x + y = 4
y + z = 6
x + z = 8.
Add all of them .
x + y + y + z + x + z = 18
2( x + y + z) = 18
x + y + z = 9
x + y + z /3 = 9/3
x + y + z/ 3 =3
C is the correct answer.
Archit3110
Major Poster
10 Apr 2019, 02:10
Kudos
Bookmarks
Bunuel
solve <30 sec
given
a+b=4---(1)
b+c=6---(2)
a+c=8--(3)
subtract 1 from 2 ; we get a-c= 2
and add this eqn to 3 eqn we get a = 3 so we can say b=1 & c = 5
so avg = 9/3 ; 3
IMO C
