19 Assume you think a boom and a recession are equally akely to happen, a 50 50 chance of the State of Economy Probability of State of Economy Security Returns if State Occurs Security L Security U 3096 Recession 0.50 20% Boom 0.50 70% 10% Based on the above information, what is a standard deviation for Security L? Select one: O a 45% O b. 25% O c. 10% O d. 20%