NO.PZ2015120604000010
问题如下：
If the interest rate is supposed to be 8% and the cashflow of $50,000 is invested today. We assume equal withdrawals can be taken out of the account at the end of each of the next twelve years so that the investor can close the account at the end of the twelfth years.Calculate the value of the withdrawal per year.
选项：
A. $1,986.
B. $6,635.
C. $2,635.
解释：
B is correct.
PV = -50,000; I/Y = 8; N = 12; FV = 0; CPT PMT = $6,634.75
N为什么是12呢？什么20年 25年
