Answer:
0%
30%
Explanation:
Given:
Average return = 15%
Standard deviation = 15%
Computation:
On assuming 68% chance,
Lowest point = Average return - Standard deviation
Lowest point = 15% - 15%
Lowest point = 0%
Highest point = Average return - Standard deviation
Highest point = 15% + 15%
Highest point = 30%
Therefore, on 68%, Lowest point is 0% and highest point is 30%.