Question 1103832
We have 4000 dollars of 2% investment.
Using the method of alligation.

<pre>
2         2        4000 dollars of 2% investment
      3            6000 dollars of 3% investment
5         1 1/2*4000=2000 dollars of 5% investment
           3
</pre>
1= 3 - 2
2= 5 - 3
2000= 4000/(2/1) dollars of 5% investment to add to your 4000 dollars of 2% investment.
6000= (4000+2000) dollars of the final 3% investment.
check
0.05 * 2000 + 0.02 * 4000 = 0.03*(4000+2000)
100.0 + 80.0 = 0.03*(6000)
180.0 = 180.0
ok