GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 18 Jun 2019, 00:05

### 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

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# The average of 20, 70, and x is 40. If the average of 20, 70, x, and y

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 55639
The average of 20, 70, and x is 40. If the average of 20, 70, x, and y  [#permalink]

### Show Tags

11 Jan 2019, 00:37
00:00

Difficulty:

5% (low)

Question Stats:

89% (00:44) correct 11% (00:56) wrong based on 33 sessions

### HideShow timer Statistics

The average of 20, 70, and x is 40. If the average of 20, 70, x, and y is 50, then y =

A. 100
B. 80
C. 70
D. 60
E. 30

_________________
Manager
Joined: 30 Oct 2018
Posts: 61
Re: The average of 20, 70, and x is 40. If the average of 20, 70, x, and y  [#permalink]

### Show Tags

11 Jan 2019, 00:43
(20+70+x)/3= 40
x=30

(20+30+70+y)/4=50
y=200-120 = 80 (B)
_________________

----------------------------------
Plz Kudos! if my post helps....
VP
Joined: 31 Oct 2013
Posts: 1372
Concentration: Accounting, Finance
GPA: 3.68
WE: Analyst (Accounting)
Re: The average of 20, 70, and x is 40. If the average of 20, 70, x, and y  [#permalink]

### Show Tags

11 Jan 2019, 00:52
Bunuel wrote:
The average of 20, 70, and x is 40. If the average of 20, 70, x, and y is 50, then y =

A. 100
B. 80
C. 70
D. 60
E. 30

20 + 70 + x = 120

x = 30.

Again,

20+ 7 0 + 30 + y = 200

y = 80.

Intern
Joined: 10 Feb 2018
Posts: 33
GMAT 1: 550 Q46 V20
The average of 20, 70, and x is 40. If the average of 20, 70, x, and y  [#permalink]

### Show Tags

11 Jan 2019, 01:10
My answer is 80 ie B
20+70+X=120
X=30
20+70+30+Y=200
Y=80
CEO
Joined: 18 Aug 2017
Posts: 3866
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
Re: The average of 20, 70, and x is 40. If the average of 20, 70, x, and y  [#permalink]

### Show Tags

11 Jan 2019, 03:06
Bunuel wrote:
The average of 20, 70, and x is 40. If the average of 20, 70, x, and y is 50, then y =

A. 100
B. 80
C. 70
D. 60
E. 30

20+70+x=120
x= 30
120+y= 200
y=80
IMO B
_________________
If you liked my solution then please give Kudos. Kudos encourage active discussions.
Re: The average of 20, 70, and x is 40. If the average of 20, 70, x, and y   [#permalink] 11 Jan 2019, 03:06
Display posts from previous: Sort by