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The average (arithmetic mean) of x and y is 55. The average
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30 Aug 2018, 07:25
30 Aug 2018, 07:25
Expert Reply
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Question Stats:
77% (00:43) correct
22% (00:56) wrong based on 90 sessions
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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.
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Re: The average (arithmetic mean) of x and y is 55. The average
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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
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gmatclubot
Re: The average (arithmetic mean) of x and y is 55. The average [#permalink]
24 Nov 2018, 15:46
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