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by gmat009 » Fri Oct 10, 2008 8:41 am
If the consumer price index for a sample of goods and services purchased in Dallas rose from 100 at the end of 1967 to x at the end of 1985, what was the average (arithmetic mean) annual increase in the index over this period?
A)(x + 100)/18
B)x/18
C)(100 − x)/18
D)(x − 100)/18
E)100x/18
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by krazy800 » Fri Oct 10, 2008 9:02 am
Its D.. ( X-100)/18
Aiming High
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by vivek.kapoor83 » Fri Oct 10, 2008 9:03 am
should be D. OA Pls/
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by gmat009 » Mon Nov 24, 2008 11:27 am
Can someone plz. explain me how it is D
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by dmateer25 » Mon Nov 24, 2008 11:35 am
It rose from 100 to x. This means x - 100 = Total increase from 1967 to 1985

Now divide x-100 by 18 to get the average annual increase.


Just as an example lets say x=190

190 - 100 = Total increase
90 = total increase


Average annual increase = 90/18 = 5
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by gmat009 » Mon Nov 24, 2008 11:54 am
dmateer25 wrote:It rose from 100 to x. This means x - 100 = Total increase from 1967 to 1985

Now divide x-100 by 18 to get the average annual increase.


Just as an example lets say x=190

190 - 100 = Total increase
90 = total increase


Average annual increase = 90/18 = 5
Thanks.........
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