You have been given this probability distribution for the holding-period return for Cheese, Inc. stock. What is the standard deviation of these returns?

State of Probability of State Rate of Return

Economy of Economy if State Occurs

Boom .20 17%

Normal .50 12%

Recession .30 5%

Group of answer choices

10.2%

4.3%

2.5%

5.4%

8.4%