Answer:
10%
Explanation:
Data provided in the question
Purchase value of the stock = $80
Number of years = 15
Times = 4
So, the return on owning this stock is
= Number of times^(1 ÷ number of years) - 1
= 4^(1÷15) - 1
= 4^0.0666666667 - 1
= 1.0968249797 - 1
= 0.0968249797
= 10% round off
All other things that are mentioned in the question is not relevant. Hence, ignored it