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Ella · 2024年02月19日

不知道自己哪做错了

  1. CFA I
  2. Economics Analysis

NO.PZ2023061903000020

问题如下：

Q. An exchange rate between two currencies has increased to 1.4500. If the base currency has appreciated by 8 percent against the price currency, the initial exchange rate between the two currencies was closest to:

选项：

A.1.3340. B.1.3426. C.1.5660.

解释：

B is correct. The percentage appreciation of the base currency can be calculated by dividing the appreciated exchange rate by the initial exchange rate. In this case, the unknown is the initial exchange rate. The initial exchange is the value of X that satisfies the formula:

1.4500/X = 1.08

Solving for X leads to 1.45/1.08 = 1.3426.



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1 个答案

笛子_品职助教 · 2024年02月19日

嗨，从没放弃的小努力你好：


同学先掌握一个知识点：汇率数字的升跌，表示base currency的升跌。


在以上知识点基础上，我们看这题。


这题说base currency升值8%，根据知识点，也就是汇率数字上涨8%后，是1.45，问上涨前的汇率数字是多少。


这是一道方程题

我们设上涨前的汇率数字为X

X*(1+8%)=1.45

X=1.3426。


同学错在不应该取倒数，想复杂了，同学按照老师提供的思路来解题就可以。





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