Mr. Nielsen invested $250,000 in two different automobile companies. The first earned a 5% profit, and second earned a 10% profit. If Mr. Nielsen made 3 times as much profit from the 10% investment as he did from the 5% investment, how much did he invest in the company that made 5%? 2. Originally Posted by bobby77 Mr. Nielsen invested$250,000 in two different automobile companies. The first earned a 5% profit, and second earned a 10% profit. If Mr. Nielsen made 3 times as much profit from the 10% investment as he did from the 5% investment, how much did he invest in the company that made 5%?
Let $\displaystyle x$ be how much invested in the 5% company, then the
amount invested in the 10% company was $\displaystyle 250-x$.

Profit from 10% investment:

$\displaystyle P_{10}=0.1(250-x)$

Profit from 5% investment:

$\displaystyle p_5=0.05\ x$

We are told that $\displaystyle P_{10}=3\times P_5$ so:

$\displaystyle 0.1 \times (250-x)=3\times (0.05 x)$

or:

$\displaystyle 25-0.1x=0.15 x$

Which you should be able to solve.

RonL