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# The average (arithmetic mean) of the coordinates of the 7 la

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The average (arithmetic mean) of the coordinates of the 7 la [#permalink]  21 Dec 2017, 16:58
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50% (00:47) correct 50% (01:06) wrong based on 6 sessions
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The average (arithmetic mean) of the coordinates of the 7 labeled points on the number line is how much greater or less than the median of the coordinates of the 7 labeled points?

A. 4/7 greater
B. 3/7 greater
C. 1/2 greater
D. 3/7 less
E. 4/7 less

kudo for the right solution and explanation
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Joined: 25 Nov 2017
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Re: The average (arithmetic mean) of the coordinates of the 7 la [#permalink]  22 Dec 2017, 01:05
A and B are cancelling F and G.
So we are left with 0 1 and 2 which is 3 /7 0,42

The median is the middel value so 1. So D
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Re: The average (arithmetic mean) of the coordinates of the 7 la [#permalink]  22 Dec 2017, 07:48
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Carcass wrote:

The average (arithmetic mean) of the coordinates of the 7 labeled points on the number line is how much greater or less than the median of the coordinates of the 7 labeled points?

A. 4/7 greater
B. 3/7 greater
C. 1/2 greater
D. 3/7 less
E. 4/7 less

Here median of 7 labelled points = middle point of these 7 points i.e = 1 on the number line

and mean of 7 labelled points = $$\frac{(-4 - 3 + 0 + 1 + 2 + 3 + 4 )}{7}$$ $$=$$$$\frac{3}{7}$$

Hence mean is less than median = $$1-\frac{3}{7}$$ $$=$$ $$\frac{4}{7}$$less

Option E
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Re: The average (arithmetic mean) of the coordinates of the 7 la   [#permalink] 22 Dec 2017, 07:48
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