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# If the average (or arithmetic mean) of 6 numbers is 4.5, what is the

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If the average (or arithmetic mean) of 6 numbers is 4.5, what is the [#permalink]

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29 Oct 2017, 00:30
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If the average (or arithmetic mean) of 6 numbers is 4.5, what is the sum of the numbers?

(A) 4.5
(B) 24
(C) 27
(D) 30
(E) cannot be determined
[Reveal] Spoiler: OA

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Re: If the average (or arithmetic mean) of 6 numbers is 4.5, what is the [#permalink]

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29 Oct 2017, 07:22
Bunuel wrote:
If the average (or arithmetic mean) of 6 numbers is 4.5, what is the sum of the numbers?

(A) 4.5
(B) 24
(C) 27
(D) 30
(E) cannot be determined

$$\frac{a + b + c + d + e + f}{6} = 4.5$$

Or, $$a + b + c + d + e + f = 27$$

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Re: If the average (or arithmetic mean) of 6 numbers is 4.5, what is the [#permalink]

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29 Oct 2017, 15:53
Abhishek009 wrote:
Bunuel wrote:
If the average (or arithmetic mean) of 6 numbers is 4.5, what is the sum of the numbers?

(A) 4.5
(B) 24
(C) 27
(D) 30
(E) cannot be determined

$$\frac{a + b + c + d + e + f}{6} = 4.5$$

Or, $$a + b + c + d + e + f = 27$$

answer is C which is 27.

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Re: If the average (or arithmetic mean) of 6 numbers is 4.5, what is the [#permalink]

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30 Oct 2017, 19:57
x = a+b+c+d+e+f

x/6 = 4.5
x=4.5*6 = 27

Ans is (C) 27

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Re: If the average (or arithmetic mean) of 6 numbers is 4.5, what is the [#permalink]

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31 Oct 2017, 15:37
Bunuel wrote:
If the average (or arithmetic mean) of 6 numbers is 4.5, what is the sum of the numbers?

(A) 4.5
(B) 24
(C) 27
(D) 30
(E) cannot be determined

We use the formula average = sum/number. Thus, we have 4.5 = sum/6. Thus, the sum is 4.5 x 6 = 27.

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Re: If the average (or arithmetic mean) of 6 numbers is 4.5, what is the [#permalink]

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02 Nov 2017, 19:54
average = sum/numbers
so Sum = 4.5*6
27
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Re: If the average (or arithmetic mean) of 6 numbers is 4.5, what is the [#permalink]

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02 Nov 2017, 22:02
sum of numbers= average of numbers x numbers
sum=4.5x6=27
ans. c.

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Re: If the average (or arithmetic mean) of 6 numbers is 4.5, what is the   [#permalink] 02 Nov 2017, 22:02
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