Answer:
B) 8.65%
Explanation:
Geometric Average Return = [(1 + r1) * (1 + r2) * - - - - - * (1 + rN)]1/N - 1
Geometric Average Return = [(1 + 0.10)^10 * (1 + 0.06)^5]^1/15 - 1
Geometric Average Return = [1.10^10 * 1.06^5]^1/15 - 1
Geometric Average Return = [2.59374*1.33823]^1/15 - 1
Geometric Average Return = (3.471021)^1/15 - 1
Geometric Average Return = 1.08650188155 - 1
Geometric Average Return = 0.08650188155
Geometric Average Return = 8.65%