GRE Prep 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.
The average (arithmetic mean) of x and y is 55. The average
[#permalink]
30 Aug 2018, 07:25
30 Aug 2018, 07:25
Expert Reply
00:00
Question Stats:
79% (00:42) correct
20% (00:47) wrong based on 84 sessions
Hide Show timer Statistics
The average (arithmetic mean) of x and y is 55. The average of y and z is 75.
A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
Quantity A |
Quantity B |
\(z - x\) |
\(40\) |
A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
Re: The average (arithmetic mean) of x and y is 55. The average
[#permalink]
24 Nov 2018, 15:46
24 Nov 2018, 15:46
sandy wrote:
The average (arithmetic mean) of x and y is 55. The average of y and z is 75.
A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
Quantity A |
Quantity B |
\(z - x\) |
\(40\) |
A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
The average (arithmetic mean) of x and y is 55
So, (x + y)/2 = 55
Multiply both sides by 2 to get: x + y = 110
The average of y and z is 75.
So, (z + y)/2 = 75
Multiply both sides by 2 to get: z + y = 150
We have:
z + y = 150
x + y = 110
Subtract the bottom equation from the top equation to get: z - x = 40
So, we have:
QUANTITY A: 40
QUANTITY B: 40
Answer: C
RELATED VIDEO FROM OUR COURSE
gmatclubot
Re: The average (arithmetic mean) of x and y is 55. The average [#permalink]
24 Nov 2018, 15:46
Moderators:
