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

 It is currently 20 Jul 2018, 10:48

### 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

# If the average of three numbers is V. If one of the numbers is Z and

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 47156
If the average of three numbers is V. If one of the numbers is Z and  [#permalink]

### Show Tags

05 Oct 2017, 05:24
00:00

Difficulty:

15% (low)

Question Stats:

98% (00:26) correct 2% (00:30) wrong based on 48 sessions

### HideShow timer Statistics

If the average of three numbers is V. If one of the numbers is Z and another is Y, what is the remaining number?

A. ZY - V
B. Z/V – 3 - Y
C. Z/3 – V - Y
D. 3V - Z - Y
E. V - Z – Y

_________________
PS Forum Moderator
Joined: 25 Feb 2013
Posts: 1183
Location: India
GPA: 3.82
Re: If the average of three numbers is V. If one of the numbers is Z and  [#permalink]

### Show Tags

05 Oct 2017, 06:39
Bunuel wrote:
If the average of three numbers is V. If one of the numbers is Z and another is Y, what is the remaining number?

A. ZY - V
B. Z/V – 3 - Y
C. Z/3 – V - Y
D. 3V - Z - Y
E. V - Z – Y

Sum of three numbers will be = 3V
Hence the third no will be = 3V-(Z+Y)=3V-Z-Y

Option D
Target Test Prep Representative
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 2965
Location: United States (CA)
Re: If the average of three numbers is V. If one of the numbers is Z and  [#permalink]

### Show Tags

09 Oct 2017, 16:42
Bunuel wrote:
If the average of three numbers is V. If one of the numbers is Z and another is Y, what is the remaining number?

A. ZY - V
B. Z/V – 3 - Y
C. Z/3 – V - Y
D. 3V - Z - Y
E. V - Z – Y

We can let the remaining number = X; thus:

(X + Z + Y)/3 = V

X + Z + Y = 3V

X = 3V - Z - Y

_________________

Scott Woodbury-Stewart
Founder and CEO

GMAT Quant Self-Study Course
500+ lessons 3000+ practice problems 800+ HD solutions

Director
Status: Preparing for GMAT
Joined: 25 Nov 2015
Posts: 675
Location: India
GPA: 3.64
Re: If the average of three numbers is V. If one of the numbers is Z and  [#permalink]

### Show Tags

10 Oct 2017, 07:49
Let the 3rd number be x.
Average = (x+Y+Z)/3 = V
x+Y+Z = 3V
Hence x = 3V-Y-Z
_________________

Please give kudos, if you like my post

When the going gets tough, the tough gets going...

BSchool Forum Moderator
Joined: 26 Feb 2016
Posts: 2948
Location: India
GPA: 3.12
Re: If the average of three numbers is V. If one of the numbers is Z and  [#permalink]

### Show Tags

10 Oct 2017, 09:07
We can define average of some numbers
to be the sum of the numbers divided by a number.

Let the third number be X.

$$V = \frac{Z+Y+X}{3}$$
X = 3V - Z - Y(Option D)
_________________

You've got what it takes, but it will take everything you've got

Re: If the average of three numbers is V. If one of the numbers is Z and &nbs [#permalink] 10 Oct 2017, 09:07
Display posts from previous: Sort by

# Events & Promotions

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.