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in country x, a decrease in the average currency exchange

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in country x, a decrease in the average currency exchange [#permalink] New post 16 Feb 2005, 01:47
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A
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C
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E

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in country x, a decrease in the average currency exchange rate - CER - of 2% or an increase of the average mortgage rate - AMR - of 1% is reflected as a 10-point increase in the national retail price index. during one month , both the CER and the AMR increased by 1%. what would be the expected change in the national retail price index ?

a -5
b 0
c +5
d +10
e +15
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 [#permalink] New post 16 Feb 2005, 02:02
fast answer : C

CER 1% -> -5pts
AMR 1% -> 10 pts

I am not sure I understood well the problem :wink:
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 [#permalink] New post 16 Feb 2005, 02:04
Yeah I was also guessing 5, but there doesnt seem to be any logic for the 5 point decrease if there is a 1% increase on the CER.
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 [#permalink] New post 16 Feb 2005, 02:07
2% dec CER yields +10 ---->1% dec CER yields +5, hence 1% inc = -5
1% inc AMR yields +10

so 10-5 = +5

yeah..its C ;)
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 [#permalink] New post 16 Feb 2005, 07:04
C it is....

If AMR increase by 1% that leads to a 10point increase....end of story...AMR increased by 1% therefor price index should increase by 10 points! if CER decrese prince index increases....by 10 points, if CER increases price point decreases....therefor 1% CER increase leades to -5 reduction in the index!

10-5=5
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 [#permalink] New post 16 Feb 2005, 07:10
Christoph, I think I got it : it's D right ?

We just have 2 elements :

if there is a decrease in the average currency exchange rate - CER - of 2% -> 10-point increase in the national retail price index.
OR
if there is an increase of the average mortgage rate - AMR - of 1% -> 10-point increase in the national retail price index.

so we can not assume the effects if there is :
an increase of CER
a decrease of AMR
it would just be assumptions

Moreover the 2 conditions are linked with "OR" wich means that one condition is enough to get the result, and as we don't know the consequences of a 1% increase in CER...

just the increase of AMR is verified so it leads to answer D
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 [#permalink] New post 16 Feb 2005, 07:32
"D" for me.

We know that only a decrease in CER makes the national point to go up, so I think we shud only consider the increase in AMR which wud effect, which will be +10.
  [#permalink] 16 Feb 2005, 07:32
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