Question 1018106
Call how much Nico invests at 8%, x.
Then the amount invested at 3% must be x - 1900.
The setup looks like this
.08x + .03(x - 1900) = 240
We then distribute and solve for x...
.08x + .03x - 57 = 240
.11x - 57 = 240
.11x = 297
Now divide by .11 and get
x = 297 / .11 = $2700 at 8%
and thus $1900 less means 
$800 at 3%...