Question 1043568
(How many years?)  The wording implies just 1 year.


The description works like a mixture problem.


x amount for risky
y amount for safe
{{{system(x+y=300000,0.07x+0.035y=15000)}}}


STEPS
{{{7x+3.5y=1500000}}}
-
{{{y=300000-x}}}
-
{{{7x+3.5(300000-x)=1500000}}}
{{{7x+1050000-3.5x=1500000}}}
{{{3.5x+1050000=1500000}}}
{{{3.5x=450000}}}
{{{highlight(system(x=128571,y=171429))}}}