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jay1180 · 2022年10月11日

这么做错哪里了~~

  1. CFA I
  2. Economics Analysis

NO.PZ2018062003000206

问题如下：

Assume that the exchange rate between CAD and USD has decreased to 1.5800. If the USD has depreciated by 5% against the price currency, which of the initial exchange rate is the most accurate between CAD and USD?

选项：

A.

1.5048.

B.

1.6632.

C.

0.6646.

解释：

B is correct.

1.5800/initial rate = 1-0.05

initial rate=1.58/0.95 = 1.6632.

考点： Percentage Change in A Currency

解析:

1.5800/初始汇率= 1-0.05

初始汇率=1.58/0.95 = 1.6632.

现在CAD/USD=1.58，所以CAD=1.58USD.

USD贬值了，所以 0.95×原来的USD=USD

带入就要CAD=1.58USD=1.58* 0.95×原来的USD=1.501原来的USD


得到：CAD/原来的USD=1.501，选A。。。。

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1 个答案

笛子_品职助教 · 2022年10月11日

嗨，爱思考的PZer你好：


这么做错哪里了~~


Hello，亲爱的同学！是乘除的方向错了。

正确的做法是：

1.5800/initial rate = 1-0.05

initial rate=1.58/0.95 = 1.6632.

所以呢，它并不是1.501


这里要有方程的数学思维了，纯想的话还是比较容易写错的了。

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