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Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.  The average of 20, 70, and x is 40. If the average of 20, 70, x, and y

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Math Expert V
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]

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Difficulty:   5% (low)

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

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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

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Manager  B
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]

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(20+70+x)/3= 40
x=30

(20+30+70+y)/4=50
y=200-120 = 80 (B)
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Plz Kudos! if my post helps....
VP  P
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]

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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  B
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]

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My answer is 80 ie B
20+70+X=120
X=30
20+70+30+Y=200
Y=80
CEO  P
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]

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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
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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
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