Answer:
a. 16.8%
b. 19.2%
Explanation:
The computation of the expectation return is shown below:
1. If 30% is invested:
= Iron Return × Probability + Copper return × Probability
= 21 × 30% + 15 × 70%
= 6.3% + 10.5%
= 16.8%
The remaining 70% is allocated to the copper
2. If 70% is invested:
= Iron Return × Probability + Copper return × Probability
= 21 × 70% + 15 × 30%
= 14.7% + 4.5%
= 19.2%
The remaining 30% is allocated to the copper