Answer: 12.4%
Step-by-step explanation:
The Expected return for a stock is the summation of all the returns given the probability of all market conditions.
Expected Return = ∑(Probability of return * return)
= (0.30 * 18%) + (0.50 * 12%) + (0.20 * 5%)
= 0.054 + 0.06 + 0.01
= 0.124
= 12.4%