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The consumer price index in Zeropia in 2009 relative to the
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The consumer price index in Zeropia in 2009 relative to the [#permalink] New post  08 Nov 2012, 15:21
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The consumer price index in Zeropia in 2009 relative to the year 2000 was 1.75, meaning that for every Zeropian dollar spent on consumer goods in 2000, $1.75 on average had to be spent in 2009. In Zeropian dollars, what was the increase in the price of Brand Z running shoes from 2000 to 2009, if these shoes’ price increased precisely according to the consumer price index?

(1) The price of Brand Z running shoes was $91 in 2009.

(2) The ratio of the dollar increase in the price of Brand Z running shoes to the price of the shoes in 2009 was 3:7.
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Re: The consumer price index in Zeropia in 2009 relative to the [#permalink] New post  08 Nov 2012, 15:49
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1) we have $ 91 in 2009 and x in 2000. the increase is 1.75 this mean that we have an increase of 75%

Using % increase formula \(x\) \(*\) \((1 +\) \(\frac{75}{100}\)\()\) \(=\) \(91\)

in the end we have \(1.75 * x = 91\) ----> \(52\)--------> \(91 - 52 = 39\) is what we are looking for

2)\(\frac{x % z}{something in 2009}\)\(=\) \(\frac{3}{7}\)say nothing about real values

A is the answer
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Re: The consumer price index in Zeropia in 2009 relative to the [#permalink] New post  09 Nov 2012, 02:26
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The consumer price index in Zeropia in 2009 relative to the year 2000 was 1.75, meaning that for every Zeropian dollar spent on consumer goods in 2000, $1.75 on average had to be spent in 2009. In Zeropian dollars, what was the increase in the price of Brand Z running shoes from 2000 to 2009, if these shoes’ price increased precisely according to the consumer price index?

Given that \(price_{2009}=price_{2000}*1.75\).

We need to find the value of \(price_{2009}-price_{2000}=0.75*price_{2000}\).

(1) The price of Brand Z running shoes was $91 in 2009 --> \(price_{2009}=$91\). We can find \(price_{2000}\), thus can answer the question. Sufficient.

(2) The ratio of the dollar increase in the price of Brand Z running shoes to the price of the shoes in 2009 was 3:7. This is the same information as given in the stem: (increase)/(price in 2009)=0.75/1.75=3/7. Not sufficient.

Answer: A.

Hope it's clear.
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Re: The consumer price index in Zeropia in 2009 relative to the [#permalink] New post  14 Sep 2019, 02:10
Pansi wrote:
The consumer price index in Zeropia in 2009 relative to the year 2000 was 1.75, meaning that for every Zeropian dollar spent on consumer goods in 2000, $1.75 on average had to be spent in 2009. In Zeropian dollars, what was the increase in the price of Brand Z running shoes from 2000 to 2009, if these shoes’ price increased precisely according to the consumer price index?

(1) The price of Brand Z running shoes was $91 in 2009.

(2) The ratio of the dollar increase in the price of Brand Z running shoes to the price of the shoes in 2009 was 3:7.


given price increase has happened from 2000 to 2009

#1The price of Brand Z running shoes was $91 in 2009.
so in 2000 price would have been ; 91/1.75 ; 52$ ; increase of 91-52 ; 39$
sufficient
#2
The ratio of the dollar increase in the price of Brand Z running shoes to the price of the shoes in 2009 was 3:7.[/quote]
price increase / price of shoes in 2009 = 3/7
value of price increase and price of shoes is not given ; insufficient
IMO A
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