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| rev | Admin | (Created page with "'''Solution: E''' Macaulay duration at an interest rate of <math>5 \%</math> is <math display="block"> \begin{aligned} & \frac{100(I a)_5+5000 v^5}{100 a_5+1000 v^5} \\ & =\frac{100(12.56639)+3917.63}{100(4.32947)+783.53}=4.2535 \end{aligned} </math> {{soacopyright | 2023 }}") | Nov 20'23 at 17:13 | +279 |