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11 Nov 2015, 00:50
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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
(A) (x + 100)/18
(B) x/18
(C) (100 − x)/18
(D) (x − 100)/18
(E) 100x/18
11 Nov 2015, 01:17
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CPI in end of 1967 = 100
CPI in end of 1985 = x
Number of years = 18
Average annual increase in CPI = (x-100)/18
Answer D
CPI in end of 1985 = x
Number of years = 18
Average annual increase in CPI = (x-100)/18
Answer D
ydmuley
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27 Dec 2016, 09:21
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Bunuel
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
(A) (x + 100)/18
(B) x/18
(C) (100 − x)/18
(D) (x − 100)/18
(E) 100x/18
CPI @ End Of 1967 = 100
CPI @ End Of 1985 = x
It says that CPI rose which means x > 100
Total Number of Years = 1985 - 1967 = 18 Years
Average = Total Gain/No. Of Years
Average = (x - 100)/18
Hence, D is the answer.
Regards,
YM
