Answer: 11%
Step-by-step explanation:
Find the expected return in both Booms and Busts;
0.5 of your money is in Asset A and Asset B each.
Boom;
= (0.50 * 12%) + (0.50 * 4%)
= 8%
Bust
= (0.50 * 6%) + (0.50 * 18%)
= 12%
Portfolio expected return = (0.25 * 8%) + (0.75 * 12%)
= 11%