Answer: 5.725%; 5.55%
Explanation:
The arithmetic average or mean is the sum of a collection of numbers that is divided by the count of the numbers in the collection.
Arithmetic average = Total return ÷ total time period
=(5.1+12.2-3.8+9.4) ÷ 4
= 22.9 ÷ 4
= 5.725%
Geometric average will be:
=[(1+rate1)(1+rate2)(1+rate3)(1+rate4)]^(1/4) - 1
=[(1+0.051)(1+0.122)(1-0.038)(1+0.094)]^(1/4)-1
=5.55%