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# If a, b, c, and d are consecutive integers and a < b < c < d, what is

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Joined: 02 Sep 2009
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If a, b, c, and d are consecutive integers and a < b < c < d, what is  [#permalink]

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19 Aug 2018, 09:46
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87% (01:18) correct 13% (01:12) wrong based on 23 sessions

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If a, b, c, and d are consecutive integers and a < b < c < d, what is the average (arithmetic mean) of a, b, c, and d in terms of d?

(A) $$d - \frac{5}{2}$$

(B) $$d - 2$$

(C) $$d - \frac{3}{2}$$

(D) $$d + \frac{3}{2}$$

(E) $$\frac{4d-6}{7}$$

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If a, b, c, and d are consecutive integers and a < b < c < d, what is  [#permalink]

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19 Aug 2018, 10:45
Bunuel wrote:
If a, b, c, and d are consecutive integers and a < b < c < d, what is the average (arithmetic mean) of a, b, c, and d in terms of d?

(A) $$d - \frac{5}{2}$$

(B) $$d - 2$$

(C) $$d - \frac{3}{2}$$

(D) $$d + \frac{3}{2}$$

(E) $$\frac{4d-6}{7}$$

since the integers are consecutive .
in terms of d
we have sum = d + (d-1) + (d-2) + (d-3)

average = $$\frac{(4d-6)}{4}$$

=d-3/2
If a, b, c, and d are consecutive integers and a < b < c < d, what is &nbs [#permalink] 19 Aug 2018, 10:45
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