Answer and Explanation:
a) Expected Return = P1 * X1 + P2 * X2 + .... Pn * Xn
Expected Return = (0.1 * -40%) + (0.1 * -14%) + (0.3 * 14%) + (0.4 * 39%)+ (0.1 * 59%)
Expected Return = -4% - 1.4% + 4.2% + 15.6% + 5.90% = 20.30% --> Answer
b) Standard deviation is square root of probability weighted squared deviations of individual values from expected values.
Std deviation = 27.98%
c) Coefficient of Variayion = Standard deviation/Expected return = 27.98%/20.30% = 1.38
d) Sharpe' Ratio = (Expected return - Rsik free rate)/Std deviation = (20.3% - 3%)/27.98% = 0.62