Answer: 12.15%
Step-by-step explanation:
The expected return is a weighted average of the returns of the individual stocks and the percentage of the portfolio invested in them.
= (Weight of R * Return of R) + (Weight of S + Return of S) + (Weight of T + Return of T)
= (29% * 9.8%) + (12% * 11.2%) + ( (1 - 29% - 12%) * 13.5%)
= 12.15%