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李羊羊羊羊 · 2022年11月16日

老师,我用这个计算式算出来是96000

NO.PZ2015120601000008

问题如下:

An analyst developed two scenarios with respect to the recovery of $100,000 principal from defaulted loans:

The amount of the expected recovery is closest to:

选项:

A.

$36,400.

B.

$55,600.

C.

$63,600.

解释:

C is correct.

If Scenario 1 occurs, the expected recovery is 60% ($50,000) + 40% ($30,000) = $42,000, and if Scenario 2 occurs, the expected recovery is 90% ($80,000) + 10%($60,000) = $78,000.

Weighting by the probability of each scenario, the expected recovery is 40%($42,000) + 60%($78,000) = $63,600.

Alternatively, first calculating the probability of each amount occurring, the expected recovery is (40%)(60%)($50,000) + (40%)(40%)($30,000) + (60%)(90%)($80,000) + (60%)(10%)($60,000) = $63,600.

这道题考察加权平均计算均值(expected recovery),权重为概率。

①首先算出scenario 1中的加权平均值为50,000×60%+30,000×40%=42,000;

同理scenario 2中加权平均值为80,000×90%+60,000×10%=78,000.

②然后再将scenario1 &2做加权平均,

42,000×40%+78,000×60%=63,600,选择C选项。

 40%*60%*50000+40%*40%*30000+60%*90%*80000+60%*10%*60000 =12000+4800+43200+36000=96000

2 个答案
已采纳答案

星星_品职助教 · 2022年11月16日

同学你好,

这一项是3,600,其余无误。

李羊羊羊羊 · 2022年11月16日

谢谢老师

星星_品职助教 · 2022年11月17日

@李羊羊羊羊 学习加油~

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