Answer:
1.1265
Step-by-step explanation:
The computation of the portfolio beta is shown below:
= Stock Q portfolio percentage × beta of Stock Q + Stock R portfolio percentage × beta of Stock R + Stock S portfolio percentage × beta of Stock S + Stock T portfolio percentage × beta of Stock Q
= 0.25 × 1.28 + 0.25 × 0.45 + 0.15 × 1.78 + 0.35 × 1.22
= 0.32 + 0.1125 + 0.267 + 0.427
= 1.1265