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# What is the average (arithmetic mean) of n, n + 1 + 2, and n + 3?

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Math Expert
Joined: 02 Sep 2009
Posts: 53004
What is the average (arithmetic mean) of n, n + 1 + 2, and n + 3?  [#permalink]

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14 Jan 2019, 03:03
00:00

Difficulty:

5% (low)

Question Stats:

88% (00:31) correct 12% (00:53) wrong based on 39 sessions

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What is the average (arithmetic mean) of n, n + 1 + 2, and n + 3?

A. n + 1

B. n + 3/2

C. n + 2

D. n + 5/2

E. n + 6

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Re: What is the average (arithmetic mean) of n, n + 1 + 2, and n + 3?  [#permalink]

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14 Jan 2019, 03:18
1
$$\frac{n + n + 1 + 2 + n + 3}{3}$$

$$\frac{3n + 6}{3}$$

n + 2

OPTION: C
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Re: What is the average (arithmetic mean) of n, n + 1 + 2, and n + 3?  [#permalink]

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14 Jan 2019, 03:50
1
Bunuel wrote:
What is the average (arithmetic mean) of n, n + 1 + 2, and n + 3?

A. n + 1

B. n + 3/2

C. n + 2

D. n + 5/2

E. n + 6

n + n+3+n+3 /3

solve
n+2
IMO C

Bunuel
IMO correct answer should be option c not b ;
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Re: What is the average (arithmetic mean) of n, n + 1 + 2, and n + 3?  [#permalink]

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15 Jan 2019, 03:08
Archit3110 wrote:
Bunuel wrote:
What is the average (arithmetic mean) of n, n + 1 + 2, and n + 3?

A. n + 1

B. n + 3/2

C. n + 2

D. n + 5/2

E. n + 6

n + n+3+n+3 /3

solve
n+2
IMO C

Bunuel
IMO correct answer should be option c not b ;

Yes. Edited. Thank you.
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Re: What is the average (arithmetic mean) of n, n + 1 + 2, and n + 3?  [#permalink]

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21 Jan 2019, 17:41
Bunuel wrote:
What is the average (arithmetic mean) of n, n + 1 + 2, and n + 3?

A. n + 1

B. n + 3/2

C. n + 2

D. n + 5/2

E. n + 6

We can create the following expression for the average of the three quantities:

(n + n + 1 + 2 + n + 3)/3

(3n + 6)/3 = n + 2

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Re: What is the average (arithmetic mean) of n, n + 1 + 2, and n + 3?   [#permalink] 21 Jan 2019, 17:41
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