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If the average (arithmetic mean) of two numbers is 35 and one of the

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If the average (arithmetic mean) of two numbers is 35 and one of the  [#permalink]

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New post 28 Feb 2019, 00:03
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A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

89% (00:29) correct 11% (00:45) wrong based on 28 sessions

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Re: If the average (arithmetic mean) of two numbers is 35 and one of the  [#permalink]

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New post 28 Feb 2019, 06:34
Bunuel wrote:
If the average (arithmetic mean) of two numbers is 35 and one of the numbers is k, then what is the other number, in terms of k ?

A. 35 + k
B. 35 – k
C. 35 − 2k
D. 70 – k
E. 70 − 2k



a+k=70
a=70-k
IMO D
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Re: If the average (arithmetic mean) of two numbers is 35 and one of the  [#permalink]

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New post 28 Feb 2019, 12:27
Bunuel wrote:
If the average (arithmetic mean) of two numbers is 35 and one of the numbers is k, then what is the other number, in terms of k ?

A. 35 + k
B. 35 – k
C. 35 − 2k
D. 70 – k
E. 70 − 2k



Sum of 2 numbers = 35*2 = 70.

One number is K.

other number = 70 - k.

D is the correct answer.
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Re: If the average (arithmetic mean) of two numbers is 35 and one of the  [#permalink]

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New post Updated on: 28 Feb 2019, 12:53
I said D as well but apparently that’s wrong. I hate this “in terms of” stuff

Posted from my mobile device

Originally posted by NonB4taxMBAib on 28 Feb 2019, 12:42.
Last edited by NonB4taxMBAib on 28 Feb 2019, 12:53, edited 1 time in total.
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Re: If the average (arithmetic mean) of two numbers is 35 and one of the  [#permalink]

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New post 28 Feb 2019, 12:51
Bunuel wrote:
If the average (arithmetic mean) of two numbers is 35 and one of the numbers is k, then what is the other number, in terms of k ?

A. 35 + k
B. 35 – k
C. 35 − 2k
D. 70 – k
E. 70 − 2k


If the average of 2 numbers is 35, then the total of those 2 numbers is 70. if one of those numbers is K then the other should be 70-k. The answer seems to be D.

Hope moderator will provide the explanation for E or change the OA to D.
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Re: If the average (arithmetic mean) of two numbers is 35 and one of the  [#permalink]

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New post 04 Mar 2019, 20:12
Bunuel wrote:
If the average (arithmetic mean) of two numbers is 35 and one of the numbers is k, then what is the other number, in terms of k ?

A. 35 + k
B. 35 – k
C. 35 − 2k
D. 70 – k
E. 70 − 2k


Let n = the other number. We can create the equation:

(n + k)/2 = 35

n + k = 70

n = 70 - k

Answer: D
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Re: If the average (arithmetic mean) of two numbers is 35 and one of the   [#permalink] 04 Mar 2019, 20:12
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