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

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Math Expert
Joined: 02 Sep 2009
Posts: 61287
If the average (arithmetic mean) of two numbers is 35 and one of the  [#permalink]

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27 Feb 2019, 23:03
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Difficulty:

15% (low)

Question Stats:

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

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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

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

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28 Feb 2019, 05:34
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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Joined: 31 Oct 2013
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Re: If the average (arithmetic mean) of two numbers is 35 and one of the  [#permalink]

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28 Feb 2019, 11:27
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.

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Joined: 15 Dec 2018
Posts: 15
Concentration: Finance
Re: If the average (arithmetic mean) of two numbers is 35 and one of the  [#permalink]

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Updated on: 28 Feb 2019, 11:53
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 Luck4Tuck on 28 Feb 2019, 11:42.
Last edited by Luck4Tuck on 28 Feb 2019, 11:53, edited 1 time in total.
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Joined: 27 May 2012
Posts: 952
Re: If the average (arithmetic mean) of two numbers is 35 and one of the  [#permalink]

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28 Feb 2019, 11:51
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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04 Mar 2019, 19:12
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

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Re: If the average (arithmetic mean) of two numbers is 35 and one of the   [#permalink] 04 Mar 2019, 19:12
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