NO.PZ2018062016000006
问题如下:
Lucy believes that after retirement she will need about $2 million totally for her daily expenses. At present, she has $1million investment at a stated annual interest rate of 2.5%. Assuming compounded daily, how long does it take for Lucy to have enough money for retirement life?
选项:
A.27.73 years
B.28.07 years
C.26.48 years
解释:
A is correct.
EAR=(1+0.025/365)365-1=0.02531
$1million*(1+0.02531)N =$2million, N=27.73 years.
我把利率2.5除以365带入算出N然后N除以365得到了27.72,这个方法跟EAR区别在哪里呢,我怎么感觉我这个更好理解一些