MC algo $11-37$ Portfolio Expected Return

You have a portfolio worth $$53,500$ that has an expected return of $12\mathrm{.}9$ percent. The portfolio has $$16,500$ invested in Stock $O,$$$24,300$ invested in

Stock $P,$ with the remainder in Stock $Q.$ The expected return on Stock $O$ is $17\mathrm{.}7$ percent and the expected return on Stock $P$ is $10\mathrm{.}9$ percent. What is the

expected return on Stock $Q?$