Events & Promotions
|
|
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.
Apr 2610:00 AM EDT
-11:00 AM EDT
The Target Test Prep course represents a quantum leap forward in GMAT preparation, a radical reinterpretation of the way that students should study. Try before you buy with a 5-day, full-access trial of the course for FREE!
Apr 2711:00 AM EDT
-12:00 PM EDT
Prefer video-based learning? The Target Test Prep OnDemand course is a one-of-a-kind video masterclass featuring 400 hours of lecture-style teaching by Scott Woodbury-Stewart, founder of Target Test Prep and one of the most accomplished GMAT instructors
Apr 2808:00 AM PDT
-11:00 AM PDT
Whether you are just beginning your MBA journey or fine-tuning your path to a 700+ score, GMAT Day is designed to give you a competitive edge.
23 May 2020, 08:38
Kudos
Bookmarks
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
85% (01:30) correct
15%
(01:35)
wrong
based on 212
sessions
History
Date
Time
Result
Not Attempted Yet
The average (arithmetic mean) of 3 positive integers, x, y, and z, is 20. If the average (arithmetic mean) of x and y is 9, what is the average (arithmetic mean) of y and z ?
(1) The average (arithmetic mean) of x and z is 22.5
(2) y = 5x
DS20412
(1) The average (arithmetic mean) of x and z is 22.5
(2) y = 5x
DS20412
If this question felt shaky,
try an adaptive mini quiz of similar problems in
GMAT Club Forum Quiz →. Free plan gives 5 questions per day.
23 May 2020, 09:21
Kudos
Bookmarks
Bunuel
Question: \(\frac{y+z}{2} =\) ?
Given: x+y+z = 20*3 = 60 and x+y = 18 i.e. z = 42
So we need either x or y to answer the question
Statement 1: x+z = 45
i.e. x = 3
i.e. y = 15
SUFFICIENT
Statement 2: y = 5x
x+y = 18
i.e. 6x = 18 and x = 3
i.e. y = 15
SUFFICIENT
Answer: Option D
bM22
Retired Moderator
Joined: 05 May 2016
Last visit: 17 Jul 2025
Posts: 522
Own Kudos:
Given Kudos: 1,316
Location: India
Schools: IIM (A) IIM (A) IIM-A '24 (A) ISB '24 (A)
Products:
24 May 2020, 05:51
Kudos
Bookmarks
Bunuel
Given x + y + z = 60.
x + y = 18
y + z = ?
Statement 1: The average (arithmetic mean) of x and z is 22.5
=> x + z = 45
=> y = 15.
=> x = 3
=> z = 42.
Since we have all the values, we can easily calculate the value of y+ z, thus, the average of the same.
So Sufficient.
Statement 2: y = 5x.
x + y = 18
=> 6x = 18.
=> x = 3.
=> y = 15.
=> z = 42.
Since we have all the values, we can easily calculate the value of y+ z, thus, the average of the same.
So Sufficient.
Answer D.
