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.
老师我的求解方法是先EAR的公式求解出EAR,得到0.25314,然后将这个数值带入计算器中的I/Y值,计算器输出的结果是2758.15,这种算法的错误之处在哪里呢?有些不明白。