Answer:
A. 1.30
Explanation:
In order to find portfolio beta we will multiply each individual stock's beta with its weight in the portfolio. Stock X has a weight of 75%(75,000/100,000) and a Beta of 1.5. Stock Y has a weight of 25%(25,000/100,000) and a Beta of 0.7.
Portfolio Beta = (1.5*0.75)+(0.70*0.25)=1.3