Question

An investor invested $3,400 in two mutual funds.One fund earned a 6%profit while the other earned a 3% profit. If the investor's total profit was $144,how much was invested in each mutual fund?

Answer 1

Let x=fraction of funds invested with 6% return,
then
3400x*0.06+3400(1-x)*0.03=144
Solve for x.